subject:(High speed craft)

University of Tasmania

1. French, BJ. Slamming of large high-speed catamarans in irregular seas.

Degree: 2012, University of Tasmania

URL: https://eprints.utas.edu.au/15915/2/whole-french-2012.pdf

► Current design methods are limited in their ability to predict long term loading statistics relating to wave loads and fatigue from prolonged cyclic loading. These… (more)

▼ Current design methods are limited in their ability to predict long term loading statistics relating to wave loads and fatigue from prolonged cyclic loading. These methods either neglect slam loads entirely or they are included as post-processed or simplified two-dimensional methods. The work presented in this thesis introduces a combined theoretical-empirical approach to determining long term load trends in realistic sea conditions during the initial stages of the design spiral. This method builds on a previously developed non-linear time-domain seakeeping strip theory method, for high-speed multi-hull vessels, using scale model testing in irregular seas as a basis for an empirical slam module. Towing tank experiments, using an extensively instrumented 2.5m hydroelastic scale model wave-piercing catamaran representative of the 112m class Incat design, were used to develop a database of slam events in a range of realistic (but idealised) irregular sea conditions. A total of 2,103 slam events were identified over 22 test conditions during the scale model experiments. Large slams generally occurred in the conditions where motions were largest; however significant scatter was present with extreme events observed to be up to four times the median for most conditions. Occurrence rates were found to be a function of encountered wave frequency and significant wave height. If the encountered wave frequency coincides with the motion resonance, slam rates increased. Increasing the significant wave height also increased slam occurrences. A wave height dependent slam threshold was identified by extrapolating occurrence rate trends with decreasing significant wave heights. Pressure measurements also revealed that the cross-deck structure was exposed to large local pressures at each measurement station, suggesting that ship designers should ensure the structure can withstand large local loads along the entire length of the bow. The non-linear time-domain seakeeping program was extended to simulate motions and loads in irregular seas and a method for constructing idealised wave spectra was developed as an input to the seakeeping code. The extended code was verified by conducting a series of program tests and then validated by comparing computational ship motions with results from the scale model experiments in the absence of slamming. A new module for predicting slam loads, based on a statistical analysis of scale model tests was then developed and integrated into the extended time-domain seakeeping method, allowing for the slam events to be determined on-line in the time-domain. Slams are identified by defining a location dependant immersion threshold criterion based on the geometry of the hull form combined with a stochastically determined variation originating from experimental observations. In the event of a slam, the maximum load and slam duration are determined by empirical methods stemming from regression analyses on experimental data. Vessel forward speed and relative vertical velocity at the centre bow truncation are…

Subjects/Keywords: slamming; catamaran; high speed craft; irregular waves

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

French, B. (2012). Slamming of large high-speed catamarans in irregular seas. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/15915/2/whole-french-2012.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

French, BJ. “Slamming of large high-speed catamarans in irregular seas.” 2012. Thesis, University of Tasmania. Accessed January 18, 2021. https://eprints.utas.edu.au/15915/2/whole-french-2012.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

French, BJ. “Slamming of large high-speed catamarans in irregular seas.” 2012. Web. 18 Jan 2021.

Vancouver:

French B. Slamming of large high-speed catamarans in irregular seas. [Internet] [Thesis]. University of Tasmania; 2012. [cited 2021 Jan 18]. Available from: https://eprints.utas.edu.au/15915/2/whole-french-2012.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

French B. Slamming of large high-speed catamarans in irregular seas. [Thesis]. University of Tasmania; 2012. Available from: https://eprints.utas.edu.au/15915/2/whole-french-2012.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

KTH

2. Alwis, Pahansen De. METHODS FOR SHOCK ANDVIBRATION EVALUATION APPLIEDON OFFSHORE POWER BOATS.

Degree: Naval Systems, 2014, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162066

► Vibration is a part of human life. People use vibrations in many useful ways but eventually human exposure to vibration has become an impediment… (more)

Subjects/Keywords: Vibration; Shock; Human Exposure; High Speed Craft

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alwis, P. D. (2014). METHODS FOR SHOCK ANDVIBRATION EVALUATION APPLIEDON OFFSHORE POWER BOATS. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162066

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Alwis, Pahansen De. “METHODS FOR SHOCK ANDVIBRATION EVALUATION APPLIEDON OFFSHORE POWER BOATS.” 2014. Thesis, KTH. Accessed January 18, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162066.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Alwis, Pahansen De. “METHODS FOR SHOCK ANDVIBRATION EVALUATION APPLIEDON OFFSHORE POWER BOATS.” 2014. Web. 18 Jan 2021.

Vancouver:

Alwis PD. METHODS FOR SHOCK ANDVIBRATION EVALUATION APPLIEDON OFFSHORE POWER BOATS. [Internet] [Thesis]. KTH; 2014. [cited 2021 Jan 18]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162066.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Alwis PD. METHODS FOR SHOCK ANDVIBRATION EVALUATION APPLIEDON OFFSHORE POWER BOATS. [Thesis]. KTH; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162066

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

3. Liam, Christopher Charles. Testing and Modeling of Shock Mitigating Seats for High Speed Craft.

Degree: MS, Mechanical Engineering, 2011, Virginia Tech

URL: http://hdl.handle.net/10919/32874

► This study conducted a series of tests on a shock mitigating seat designed for high speed craft using various input excitations to better understand the… (more)

Subjects/Keywords: high speed craft; shock mitigating seats

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liam, C. C. (2011). Testing and Modeling of Shock Mitigating Seats for High Speed Craft. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/32874

Chicago Manual of Style (16^th Edition):

Liam, Christopher Charles. “Testing and Modeling of Shock Mitigating Seats for High Speed Craft.” 2011. Masters Thesis, Virginia Tech. Accessed January 18, 2021. http://hdl.handle.net/10919/32874.

MLA Handbook (7^th Edition):

Liam, Christopher Charles. “Testing and Modeling of Shock Mitigating Seats for High Speed Craft.” 2011. Web. 18 Jan 2021.

Vancouver:

Liam CC. Testing and Modeling of Shock Mitigating Seats for High Speed Craft. [Internet] [Masters thesis]. Virginia Tech; 2011. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10919/32874.

Council of Science Editors:

Liam CC. Testing and Modeling of Shock Mitigating Seats for High Speed Craft. [Masters Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/32874

Virginia Tech

4. Lee, Evan Joseph. Advancements of Stepped Planing Hulls.

Degree: PhD, Aerospace Engineering, 2014, Virginia Tech

URL: http://hdl.handle.net/10919/51123

► The straight line calm water performance of stepped planing hulls has been studied experimentally, by prediction method, and numerically. A model test was conducted to… (more)

Subjects/Keywords: Stepped Planing Hull; High Speed Craft; Hydrodynamics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, E. J. (2014). Advancements of Stepped Planing Hulls. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/51123

Chicago Manual of Style (16^th Edition):

Lee, Evan Joseph. “Advancements of Stepped Planing Hulls.” 2014. Doctoral Dissertation, Virginia Tech. Accessed January 18, 2021. http://hdl.handle.net/10919/51123.

MLA Handbook (7^th Edition):

Lee, Evan Joseph. “Advancements of Stepped Planing Hulls.” 2014. Web. 18 Jan 2021.

Vancouver:

Lee EJ. Advancements of Stepped Planing Hulls. [Internet] [Doctoral dissertation]. Virginia Tech; 2014. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10919/51123.

Council of Science Editors:

Lee EJ. Advancements of Stepped Planing Hulls. [Doctoral Dissertation]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/51123

University of New South Wales

5. Mohamad Ayob, Ahmad Faisal. Development of an Optimization Framework for the Design of High Speed Planing Craft.

Degree: Engineering & Information Technology, 2011, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/52145 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10815/SOURCE01?view=true

► High speed planing craft play key roles in supporting several critical maritime activities, e.g., coastal surveillance, reconnaissance, life-saving operations, passenger and high value cargo transport.… (more)

▼ High speed planing craft play key roles in supporting several critical maritime activities, e.g., coastal surveillance, reconnaissance, life-saving operations, passenger and high value cargo transport. Despite their significant use, formal optimization frameworks have rarely been proposed to deal with their design challenges. In this thesis, an optimization framework for the preliminary design of high speed planing craft is presented. Several case studies of single- and multi-objective formulations of high speed planing craft design problem are solved using state-of-the-art optimization algorithms. The notion of scenario-based design optimization and innovization, i.e. a means to uncover design relations are also discussed.A modular, extensible design optimization framework that allows the analysis tools to be extended or replaced with the desired level of complexity or with the state-of-the-art analysis tools is proposed in this thesis. A validated 3D mathematical model of high speed planing craft hull form has been identified in this thesis. The use of global parametric transformation that preserves surface fairness and allows for the presence of curve discontinuities is incorporated. A suite of three state-of-the-art optimization algorithms, namely NSGA-II, IDEA and SA-EA is incorporated within the framework. The performances of the algorithms are compared using the case studies. Solutions to single-objective minimization of calm water resistance, resistance in a seaway and multi-objective formulations considering minimization of total resistance, vertical impact acceleration and steady turning diameter have been presented. The capability of the framework to capture design trade-offs is illustrated. The case studies are extended to provide for scenario-based design optimization in order to demonstrate the capability of the framework to solve optimization problems based on the ship's operational profile and operating conditions. A concept of innovization, which allows for the automatic discovery of design rules governing optimum hull forms, is introduced. The relationship gathered through the process of innovization is applied as a cheap pseudo-performance indicator within an optimization formulation, where the results compare favourably with the empirical estimate obtained from experimental data. Such extensions are new contributions to the ship design discipline, in which opens up the possibility of the development of optimum design rules for any particular ship class. Advisors/Committee Members: Ray, Tapabrata, Engineering & Information Technology, Australian Defence Force Academy, UNSW, Smith, Warren, Engineering & Information Technology, Australian Defence Force Academy, UNSW.

Subjects/Keywords: planing craft; ship design; high speed craft; naval architecture; optimization; framework

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mohamad Ayob, A. F. (2011). Development of an Optimization Framework for the Design of High Speed Planing Craft. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/52145 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10815/SOURCE01?view=true

Chicago Manual of Style (16^th Edition):

Mohamad Ayob, Ahmad Faisal. “Development of an Optimization Framework for the Design of High Speed Planing Craft.” 2011. Doctoral Dissertation, University of New South Wales. Accessed January 18, 2021. http://handle.unsw.edu.au/1959.4/52145 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10815/SOURCE01?view=true.

MLA Handbook (7^th Edition):

Mohamad Ayob, Ahmad Faisal. “Development of an Optimization Framework for the Design of High Speed Planing Craft.” 2011. Web. 18 Jan 2021.

Vancouver:

Mohamad Ayob AF. Development of an Optimization Framework for the Design of High Speed Planing Craft. [Internet] [Doctoral dissertation]. University of New South Wales; 2011. [cited 2021 Jan 18]. Available from: http://handle.unsw.edu.au/1959.4/52145 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10815/SOURCE01?view=true.

Council of Science Editors:

Mohamad Ayob AF. Development of an Optimization Framework for the Design of High Speed Planing Craft. [Doctoral Dissertation]. University of New South Wales; 2011. Available from: http://handle.unsw.edu.au/1959.4/52145 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10815/SOURCE01?view=true

KTH

6. Antonatos, Alexandros. Parametric FE-modeling of High-speed Craft Structures.

Degree: Naval Systems, 2012, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119698

► The primary aim of the thesis was to investigate aluminum as building material for high speed craft, study the hull structure design processes of… (more)

▼ The primary aim of the thesis was to investigate aluminum as building material for high speed craft, study the hull structure design processes of aluminum high speed craft and develop a parametric model to reduce the modeling time during nite element analysis. An additional aim of the thesis was to study the degree of validity of the idealizations and the assumptions of the semi-empirical design methods by using the parametric model. For the aluminum survey, a large amount of scientic papers and books related to the application of aluminum in shipbuilding industry were re-viewed while for the investigation of hull structure design, several designs of similar craft as well as all the classication rules for high speed craft were examined. The parametric model was developed on Abaqus nite ele-ment analysis software with the help of Python programming language. The study of the idealizations and the assumptions of the semi-empirical design methods was performed on a model derived by the parametric model with scanltings determined by the high speed craft classication rules of ABS. The review on aluminum showed that only specic alloys can be applied on marine applications. It also showed that the eect of reduced mechanical properties due to welding could be decreased by introducing new welding and manufacturing techniques. The study regarding the hull structure de-sign processes indicated that high speed craft are still designed according to semi-empirical classication rules but it also showed that there is ten- dency of transiting on direct calculation methods. The developed paramet-ric model does decrease the modeling time since it is capable of modeling numerous structural arrangements. The analysis related to the idealizations and the assumptions of the semi-empirical design methods revealed that the structural hierarchy idealization and the method of dening boundary by handbook type formulas are applicable for the particular structure while the interaction eect among the structural members is only possible to be studied by detailed modeling techniques.

Subjects/Keywords: high speed craft; aluminum; hull structure design; nite element analy-

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Antonatos, A. (2012). Parametric FE-modeling of High-speed Craft Structures. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119698

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Antonatos, Alexandros. “Parametric FE-modeling of High-speed Craft Structures.” 2012. Thesis, KTH. Accessed January 18, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119698.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Antonatos, Alexandros. “Parametric FE-modeling of High-speed Craft Structures.” 2012. Web. 18 Jan 2021.

Vancouver:

Antonatos A. Parametric FE-modeling of High-speed Craft Structures. [Internet] [Thesis]. KTH; 2012. [cited 2021 Jan 18]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119698.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Antonatos A. Parametric FE-modeling of High-speed Craft Structures. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119698

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

7. Boekhout, M. (author). Hydrogen Powered Ship Propulsion for High-Speed Craft: The implementation of Fuel Cell Battery Propulsion Systems.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d06f091c-a970-48e1-8a66-3d791b91f18a

►

The shipping industry has a notable share in global greenhouse gas emissions and other pollutants such as sulphur and nitrogen oxides. Fuel cells and batteries… (more)

▼

The shipping industry has a notable share in global greenhouse gas emissions and other pollutants such as sulphur and nitrogen oxides. Fuel cells and batteries are identified as relatively new technologies for shipping with high potential and hydrogen is also considered as one of the most promising sustainable fuels, especially for smaller vessels. This research contributes to three identified knowledge gaps: (1) the potential of hydrogen propulsion for high-speed craft, (2) the hybridisation of fuel cells and batteries for marine applications and (3) the characteristics of the response of a hybrid fuel cell/battery propulsion system under transient loads. The objective of this research is to analyse these aspects based on a series of time domain simulations of various operational conditions. A mathematical model of a fuel cell/battery propulsion system is developed in Matlab/Simulink. The developed model is used to analyse the energy consumption for various operational conditions of a test vessel. Based on this analysis, two configurations of fuel cell power and battery energy are selected. If the vessel sails at top speed, the fuel cell power stacks operate at maximum power and the battery operates as power booster. A strong correlation was found between the endurance at top speed and the battery size which is selected. A larger battery has a positive effect on endurance, but it also increases the displacement of the vessel significantly and, hence, required power. Fuel cells are least responsive and these should be protected against high fluctuations in a short time. A fuel cell can only follow low-frequency transient loads. The battery is required to support in high-frequency load changes. Contrary to the fuel cell, both the battery and PMSM were found to have very favourable characteristics in transient conditions. Finally, it is concluded that it is feasible to implement fuel cell/battery propulsion on high-speed craft. It is proposed that the fuel cell and hydrogen deliver the majority of the energy and use the battery as power booster and for transient support. Novel energy management strategies can deliver high system efficiencies in both full and part load and this is one of the main advantages of hybridisation. The implementation of a fuel cell/battery system does, however, come at significant costs in terms of endurance and top speed due to the low volumetric energy density of hydrogen. It should be acknowledged that the functionality of the vessel is reduced. In addition to this, the storage of hydrogen requires some deck space, so the cargo capacity in terms of crew and material is also reduced. Therefore, it is recommended to redefine the user profile of the vessel.

Ship Design, Production and Operations (SDPO)

Advisors/Committee Members: de Vos, P. (mentor), Visser, K. (mentor), Rijkens, A.A.K. (mentor), Colonna di Paliano, P. (graduation committee), de Koning Gans, H.J. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Fuel Cell; Hydrogen; Battery; high speed craft; zero emission fuels

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Boekhout, M. (. (2020). Hydrogen Powered Ship Propulsion for High-Speed Craft: The implementation of Fuel Cell Battery Propulsion Systems. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d06f091c-a970-48e1-8a66-3d791b91f18a

Chicago Manual of Style (16^th Edition):

Boekhout, M (author). “Hydrogen Powered Ship Propulsion for High-Speed Craft: The implementation of Fuel Cell Battery Propulsion Systems.” 2020. Masters Thesis, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:d06f091c-a970-48e1-8a66-3d791b91f18a.

MLA Handbook (7^th Edition):

Boekhout, M (author). “Hydrogen Powered Ship Propulsion for High-Speed Craft: The implementation of Fuel Cell Battery Propulsion Systems.” 2020. Web. 18 Jan 2021.

Vancouver:

Boekhout M(. Hydrogen Powered Ship Propulsion for High-Speed Craft: The implementation of Fuel Cell Battery Propulsion Systems. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:d06f091c-a970-48e1-8a66-3d791b91f18a.

Council of Science Editors:

Boekhout M(. Hydrogen Powered Ship Propulsion for High-Speed Craft: The implementation of Fuel Cell Battery Propulsion Systems. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:d06f091c-a970-48e1-8a66-3d791b91f18a

University of Tasmania

8. Magoga, TF. Development of a structural fatigue life assessment framework for high-performance naval ships.

Degree: 2019, University of Tasmania

URL: https://eprints.utas.edu.au/33961/1/Magoga_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/33961/2/Magoga_whole_thesis.pdf ; Magoga, TF ORCID: 0000-0003-1636-264X <https://orcid.org/0000-0003-1636-264X> 2019 , 'Development of a structural fatigue life assessment framework for high-performance naval ships', PhD thesis, University of Tasmania.

► Navies around the world have been using High Speed Light Craft (HSLC) in a wider range of military roles and ocean environments than ever before.… (more)

▼ Navies around the world have been using High Speed Light Craft (HSLC) in a wider range of military roles and ocean environments than ever before. This increasing range of operations, use of lightweight scantlings, and susceptibility to slamming necessitates the development of improved structural fatigue assessment methods. These improved methods are required to ensure that a HSLC will meet its intended life, and to evaluate the impact of through-life modifications to the structure or operational profile. This PhD thesis covers the development of an efficient structural fatigue life assessment framework for high-performance naval ships. The framework helps to inform risks through-life for decision-makers, by integrating real-world data and optimised tool selection. The thesis begins with a critical review of available approaches to fatigue assessment and their associated merits and limitations when applied to naval aluminium HSLC. The review is followed by fatigue analyses of a naval HSLC using the different approaches, to establish their accuracy, fidelity, and expense. This part of the research includes the utilisation of full-scale measurements to quantify and explore the characteristics of slam events. The significant contribution of slamming to the fatigue damage is also demonstrated. Though the S-N curve concept in fatigue analysis is commonly used in the maritime industry, there are diverse specifications for its use which leads to different fatigue life estimates. Therefore, a new implementation of the nominal stress approach to assess the fatigue life of different welded details on the naval HSLC is presented. In the later stage of the thesis, a robust, easily implemented hybrid method for naval HSLC fatigue assessment is presented. The method uses a tailored combination of in-service data, fleet maintenance reports, and Finite Element Analysis to predict ongoing fatigue life and hence support the management of the remaining service life of a ship. The merit of the framework is demonstrated through the determination of the optimum approach to providing advice regarding the structural Life of Type (LOT) of naval HSLC for decision-makers. This includes identification of the variables that reduce the confidence limits of the LOT answer. The impact of the research includes improved understanding of the uncertainties and interdependencies between the fatigue life and capability aspects of naval ships, and the establishment of an evidence-base for setting testable requirements for new ships to support both the fleet-in-being and naval shipbuilding.

Subjects/Keywords: Fatigue life; slamming; hull monitoring; high speed light craft; naval ships; marine-grade aluminium

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Magoga, T. (2019). Development of a structural fatigue life assessment framework for high-performance naval ships. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/33961/1/Magoga_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/33961/2/Magoga_whole_thesis.pdf ; Magoga, TF ORCID: 0000-0003-1636-264X <https://orcid.org/0000-0003-1636-264X> 2019 , 'Development of a structural fatigue life assessment framework for high-performance naval ships', PhD thesis, University of Tasmania.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Magoga, TF. “Development of a structural fatigue life assessment framework for high-performance naval ships.” 2019. Thesis, University of Tasmania. Accessed January 18, 2021. https://eprints.utas.edu.au/33961/1/Magoga_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/33961/2/Magoga_whole_thesis.pdf ; Magoga, TF ORCID: 0000-0003-1636-264X <https://orcid.org/0000-0003-1636-264X> 2019 , 'Development of a structural fatigue life assessment framework for high-performance naval ships', PhD thesis, University of Tasmania..

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Magoga, TF. “Development of a structural fatigue life assessment framework for high-performance naval ships.” 2019. Web. 18 Jan 2021.

Vancouver:

Magoga T. Development of a structural fatigue life assessment framework for high-performance naval ships. [Internet] [Thesis]. University of Tasmania; 2019. [cited 2021 Jan 18]. Available from: https://eprints.utas.edu.au/33961/1/Magoga_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/33961/2/Magoga_whole_thesis.pdf ; Magoga, TF ORCID: 0000-0003-1636-264X <https://orcid.org/0000-0003-1636-264X> 2019 , 'Development of a structural fatigue life assessment framework for high-performance naval ships', PhD thesis, University of Tasmania..

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Magoga T. Development of a structural fatigue life assessment framework for high-performance naval ships. [Thesis]. University of Tasmania; 2019. Available from: https://eprints.utas.edu.au/33961/1/Magoga_whole_thesis_ex_pub_mat.pdf ; https://eprints.utas.edu.au/33961/2/Magoga_whole_thesis.pdf ; Magoga, TF ORCID: 0000-0003-1636-264X <https://orcid.org/0000-0003-1636-264X> 2019 , 'Development of a structural fatigue life assessment framework for high-performance naval ships', PhD thesis, University of Tasmania.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Lehigh University

9. Thodal, Robert Skoglund. On Full Scale Slamming Testing of High-Speed Boats.

Degree: PhD, Mechanical Engineering, 2016, Lehigh University

URL: https://preserve.lehigh.edu/etd/2841

► This dissertation consists of four articles on the experimental investigation of slamming in high speed craft. The investigation utilizes data from the purpose-built 9 meter… (more)

▼ This dissertation consists of four articles on the experimental investigation of slamming in high speed craft. The investigation utilizes data from the purpose-built 9 meter high-speed offshore research boat Numerette. The unique hybrid steel/composite construction and high-speed, high channel count instrumentation and data acquisition system have enabled collection of the wealth of experimental data that is analyzed in these articles. In the first article the role of hull bottom panel stiffness in slamming is investigated. Two panels of differing construction are mounted on starboard and port on the Numerette, which is run at relatively high speeds in the Atlantic Ocean. Displacements of the two different panels are compared. The structural response under slamming loading is then compared with the behavior under static loading. It is shown that the static stiffness relationship is not directly reflected in the experimental slamming data; rather the relative response falls somewhere between the case of a static loading and the dynamic response of a simple mass-spring system. In the second article, the structural response of bottom panels to slamming loads is investigated further. Experiments are described and results presented for modal and static analysis of the Numerette bottom panels in free air. Strain data is then presented from slamming experiments, investigating the influence of wave encounter conditions and vessel rigid body motions on response in the time and frequency domains.The third article presents an analysis technique that uses the wavelet transform to provide insight into the behavior of marine structures subjected to slamming loads. Pressure, strain, acceleration and displacement data for an isolated slamming event are presented in the time domain and in the frequency domain with Fourier transforms and wavelet transforms. Two periods of high acceleration are identified and using the wavelet transform are shown to be vibration at the dry and then wet eigenfrequencies. Mode shapes are identified during these two phases using data from an array of accelerometers. The optimal time-frequency resolution of the wavelet transform makes it a powerful tool in analyzing slamming data, revealing non-stationary behavior that the Fourier transform obscures. Identifying such behavior can be critical, in particular in hull structures with reduced stiffness where strong hydroelastic effects are expected.The final article presents the validation of a high fidelity CFD/FE FSI code using data from Numerette. The CFD code CFDShip-Iowa and finite element solver Ansys are used. Hydrodynamic simulations are performed at a range of Froude numbers and sea conditions. Good agreement is shown with experimental data in calm seas. A one-way fluid structure interaction study is performed and strains show a qualitative agreement between numerical and experimental data.These articles give insight to the designer of high speed craft by comparing the response of panels of varying, but relevant constructions to slamming loads.… Advisors/Committee Members: Grenestedt, Joachim L..

Subjects/Keywords: experimental; full scale; high-speed craft; hydrodynamic impact; slamming; Engineering; Mechanical Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Thodal, R. S. (2016). On Full Scale Slamming Testing of High-Speed Boats. (Doctoral Dissertation). Lehigh University. Retrieved from https://preserve.lehigh.edu/etd/2841

Chicago Manual of Style (16^th Edition):

Thodal, Robert Skoglund. “On Full Scale Slamming Testing of High-Speed Boats.” 2016. Doctoral Dissertation, Lehigh University. Accessed January 18, 2021. https://preserve.lehigh.edu/etd/2841.

MLA Handbook (7^th Edition):

Thodal, Robert Skoglund. “On Full Scale Slamming Testing of High-Speed Boats.” 2016. Web. 18 Jan 2021.

Vancouver:

Thodal RS. On Full Scale Slamming Testing of High-Speed Boats. [Internet] [Doctoral dissertation]. Lehigh University; 2016. [cited 2021 Jan 18]. Available from: https://preserve.lehigh.edu/etd/2841.

Council of Science Editors:

Thodal RS. On Full Scale Slamming Testing of High-Speed Boats. [Doctoral Dissertation]. Lehigh University; 2016. Available from: https://preserve.lehigh.edu/etd/2841

Grand Valley State University

10. Crosby, Mowgli J. A CFD Study on the Performance of High Speed Planing Hulls.

Degree: 2019, Grand Valley State University

URL: https://scholarworks.gvsu.edu/theses/966

► Most high speed water craft are able to achieve high speeds through the use of a planing hull. Planing hulls use hydrodynamic forces to lift… (more)

▼ Most high speed water craft are able to achieve high speeds through the use of a planing hull. Planing hulls use hydrodynamic forces to lift a portion of the vessel out of the water, reducing drag, and allowing for greater speeds. Determining the flow around such vessels is traditionally achieved using a scale model in a tow tank. The purpose of this study was to analyze the performance of a high speed planing hull determine the effects of several geometric features using computational fluid dynamics rather than traditional experimentation. The goal was to determine the best configuration to ensure the lowest resistance on the hull at high speed. This was achieved using STAR CCM+ to solve a three dimensional computational analysis for the multiphase flow and dynamic motion of a planing hull. An initial simulation was created for a 25 ft base hull and validated using experimental data from a towing tank. After developing an accurate simulation for a single hull, the hull geometry was modified to test for the effects of the keel line geometry, deadrise angle, and spray rail location. A full factorial DOE analysis was performed to examine the effects of the tested geometric features and the interactions between them. The results from this analysis showed that the tested features had a significant effect on the performance of the hull. Increasing the deadrise angle resulted in a decrease in sinkage, an increase in trim angle, and an increase in the total drag on the hull. Raising the keel line height caused a decrease in trim angle and sinkage, while increasing the total drag. These two terms had a significant interaction. As one increased, the relative effect of changing the other also increased for total drag. The final geometric feature tested was the spray rails. Adding spray rails to the bottom of the hull significantly increased the sinkage. Moving the location of the spray rails away from the center of the hull increased the total drag. This showed that the total drag could be significantly reduced by altering these geometric features of the hull.

Subjects/Keywords: high speed water craft; planing hull; hydrodynamics; computational fluid dynamics; Computational Engineering; Dynamics and Dynamical Systems

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Crosby, M. J. (2019). A CFD Study on the Performance of High Speed Planing Hulls. (Thesis). Grand Valley State University. Retrieved from https://scholarworks.gvsu.edu/theses/966

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Crosby, Mowgli J. “A CFD Study on the Performance of High Speed Planing Hulls.” 2019. Thesis, Grand Valley State University. Accessed January 18, 2021. https://scholarworks.gvsu.edu/theses/966.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Crosby, Mowgli J. “A CFD Study on the Performance of High Speed Planing Hulls.” 2019. Web. 18 Jan 2021.

Vancouver:

Crosby MJ. A CFD Study on the Performance of High Speed Planing Hulls. [Internet] [Thesis]. Grand Valley State University; 2019. [cited 2021 Jan 18]. Available from: https://scholarworks.gvsu.edu/theses/966.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Crosby MJ. A CFD Study on the Performance of High Speed Planing Hulls. [Thesis]. Grand Valley State University; 2019. Available from: https://scholarworks.gvsu.edu/theses/966

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

11. van den Nieuwenhuijzen, Niek (author). Preventing Injuries of High Speed Marine Craft Operators: Incorporating Spinal Injury Models in the Analyses of Various Seat Suspension Principles.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:700ac53d-77cc-4055-b3f5-20c6bfe4e48e

► On board of High Speed marine Craft (HSC), the crew and the passengers are exposed to high levels of Whole Body Vibrations (WBV) and large… (more)

▼ On board of High Speed marine Craft (HSC), the crew and the passengers are exposed to high levels of Whole Body Vibrations (WBV) and large magnitude Repeated mechanical Shocks (RS) caused by the motions of the craft. The HSCs are typically 10 meters long, capable of reaching a maximum speed up to 50 knots and widely used by various maritime organizations. However, the operators and crew suffer from fatigue and injuries, leading to a reduced effectiveness and operational capacity of the marine craft. In an attempt to reduce the physical loads, passive Shock Mitigating Seats (SMS) can be installed. Numerous research has shown that an improperly designed SMS may amplify the wave impacts forces through phenomena such as bottoming out and dynamic amplification. Therefore, it is necessary to ensure that a suspension design works properly by testing the performance during wave impact events, before the seat is manufactured and installed onboard the craft. The problem is that it is difficult to determine the performance of the seats in both the design and off-design conditions with either sea trials or laboratory tests. This research focuses on the prevention of injuries and adverse health effects due to repetitive wave impacts by incorporating an injury model in the analyses of various suspension principles in the design of SMS. In the current analyses of SMS either simplistic or specific models are used which restrict the application of these models to other suspension designs. Therefore, a computer program based on the finite element method is developed that allows realistic input accelerations in the surge, heave and pitch direction. The program incorporates highly non-linear elements, including the effect of bottoming. Additionally, the validity of the half-sine approximation for the wave impact excitation pulse was reviewed and concluded to be inappropriate for design purposes as it underestimates the probability of bottoming. Furthermore, the modified evaluation methods of ISO 2631 Part 5 using an optimized age-dependent coefficient based on gender in combination with a Weibull injury risk model were implemented to evaluate the resulting seat level accelerations. A case study was conducted on a Fast Raiding Interception and Special forces Craft (FRISC) of the Royal Netherlands Navy (RNLN). A design based on a parallelogram of pinned truss elements in combination with a coil spring element was altered by replacing the coil spring with a gas-spring element. The design was analysed with dynamic simulations of full-scale measurements of wave impacts on a lifeboat of the Royal Sea Rescue Institution (KNRM). For the most severe wave impact of the acceleration record, the seat level acceleration was reduced from 17.7 [g] to 2.8 [g]. An operator of the age of 24 years who is exposed to the accelerations for half an hour a day, 30 days a year for two consecutive years was assumed. The probability of spinal injury was reduced for a male operator from 99.5% to 16.3% and for a female operator from 100.0% to 42.0%. These results… Advisors/Committee Members: Notenboom, R.P. (mentor), Vredeveldt, A.W. (mentor), Walters, C.L. (mentor), den Besten, J.H. (graduation committee), Bergsma, O.K. (graduation committee), Seyffert, H.C. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Shock Mitigating Seat; High Speed Marine Craft; Repetitive Wave Impacts; Suspension Principles; Half-Sine Approximation; Spinal Injury Models

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

van den Nieuwenhuijzen, N. (. (2020). Preventing Injuries of High Speed Marine Craft Operators: Incorporating Spinal Injury Models in the Analyses of Various Seat Suspension Principles. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:700ac53d-77cc-4055-b3f5-20c6bfe4e48e

Chicago Manual of Style (16^th Edition):

van den Nieuwenhuijzen, Niek (author). “Preventing Injuries of High Speed Marine Craft Operators: Incorporating Spinal Injury Models in the Analyses of Various Seat Suspension Principles.” 2020. Masters Thesis, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:700ac53d-77cc-4055-b3f5-20c6bfe4e48e.

MLA Handbook (7^th Edition):

van den Nieuwenhuijzen, Niek (author). “Preventing Injuries of High Speed Marine Craft Operators: Incorporating Spinal Injury Models in the Analyses of Various Seat Suspension Principles.” 2020. Web. 18 Jan 2021.

Vancouver:

van den Nieuwenhuijzen N(. Preventing Injuries of High Speed Marine Craft Operators: Incorporating Spinal Injury Models in the Analyses of Various Seat Suspension Principles. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:700ac53d-77cc-4055-b3f5-20c6bfe4e48e.

Council of Science Editors:

van den Nieuwenhuijzen N(. Preventing Injuries of High Speed Marine Craft Operators: Incorporating Spinal Injury Models in the Analyses of Various Seat Suspension Principles. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:700ac53d-77cc-4055-b3f5-20c6bfe4e48e

KTH

12. Lei, Xiangyu. Experimental Setup for Validating Simulated Local Structure Responses for High-speed Craft in Waves.

Degree: Naval Systems, 2017, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215003

► Using scantling codes such as DNV or ISO for designing high speed craft has been a routine for many constructors. However, the validity of… (more)

Subjects/Keywords: high-speed craft; slamming events; experiments; validation; structural responses; Master; Engineering and Technology; Teknik och teknologier

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lei, X. (2017). Experimental Setup for Validating Simulated Local Structure Responses for High-speed Craft in Waves. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215003

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lei, Xiangyu. “Experimental Setup for Validating Simulated Local Structure Responses for High-speed Craft in Waves.” 2017. Thesis, KTH. Accessed January 18, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215003.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lei, Xiangyu. “Experimental Setup for Validating Simulated Local Structure Responses for High-speed Craft in Waves.” 2017. Web. 18 Jan 2021.

Vancouver:

Lei X. Experimental Setup for Validating Simulated Local Structure Responses for High-speed Craft in Waves. [Internet] [Thesis]. KTH; 2017. [cited 2021 Jan 18]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215003.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lei X. Experimental Setup for Validating Simulated Local Structure Responses for High-speed Craft in Waves. [Thesis]. KTH; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215003

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Michigan

13. Castro-Feliciano, Esteban L. Co-Design of Planing Craft and Active Control Systems.

Degree: PhD, Naval Architecture and Marine Engineering, 2016, University of Michigan

URL: http://hdl.handle.net/2027.42/133234

► The available planing craft design tools and guidelines were not envisioned to be used with vessels that have Active Control Systems (ACS). Consequently, vessels with… (more)

▼ The available planing craft design tools and guidelines were not envisioned to be used with vessels that have Active Control Systems (ACS). Consequently, vessels with ACS are conventionally designed in a sequential manner: first, the geometry of the vessel is designed using traditional guidelines, and then the ACS is implemented. However, sequential design is not always optimal for systems whose dynamics are coupled. This work establishes a co-design framework for a planing craft and its ACS, combines tools in the disciplines of naval architecture, control systems, and optimization in a novel way to perform co-design studies, and compares them with the sequential design. The study was limited to numerical studies based on reduced order models and the strip-theory time-domain planing craft simulation program POWERSEA. The planing crafts studied are prismatic and have a 12 m length and 10.2 tonne displacement. The ACS is modeled as body forces and the controller investigated is a linear-quadratic regulator (LQR); this work did not look into the design or optimization of the ACS's hardware. The calm-water performance was measured with a semi-empirical reduced order model and with POWERSEA. The seakeeping and seaway drag were estimated in sea states (SS) 2 and 3 and the Pareto front was estimated from an exhaustive search that varied the vessel's longitudinal center of gravity (lcg), deadrise and pitch velocity gain for the LQR estimation. Afterwards the Pareto estimation technique Adaptive Weighted Sum (AWS) was modified to better suit the Pareto estimation performed in this study, resulting in the Modified Adaptive Weighted Sum (MAWS). MAWS was applied to the case where the vessel's beam, lcg, deadrise and the LQR's pitch and heave velocity gains are optimized for SS 3. Finally, the real-world feasibility of designing the sequential and co-design vessels, obtained from the MAWS, was investigated with a case-study. Co-designing shows potential to significantly reduce calm-water and seaway drag (10% in some cases), and improve seakeeping (20% in some cases). Thus, the co-design framework offers an opportunity for designing planing craft that are more efficient and have better seakeeping than any planing craft ever built before. Advisors/Committee Members: Sun, Jing (committee member), Troesch, Armin W (committee member), Revzen, Shai (committee member), Singer, David Jacob (committee member).

Subjects/Keywords: design of planing craft with active control systems; improving seakeeping and drag of high speed vessels with active control systems; Naval Architecture and Marine Engineering; Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Castro-Feliciano, E. L. (2016). Co-Design of Planing Craft and Active Control Systems. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/133234

Chicago Manual of Style (16^th Edition):

Castro-Feliciano, Esteban L. “Co-Design of Planing Craft and Active Control Systems.” 2016. Doctoral Dissertation, University of Michigan. Accessed January 18, 2021. http://hdl.handle.net/2027.42/133234.

MLA Handbook (7^th Edition):

Castro-Feliciano, Esteban L. “Co-Design of Planing Craft and Active Control Systems.” 2016. Web. 18 Jan 2021.

Vancouver:

Castro-Feliciano EL. Co-Design of Planing Craft and Active Control Systems. [Internet] [Doctoral dissertation]. University of Michigan; 2016. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2027.42/133234.

Council of Science Editors:

Castro-Feliciano EL. Co-Design of Planing Craft and Active Control Systems. [Doctoral Dissertation]. University of Michigan; 2016. Available from: http://hdl.handle.net/2027.42/133234

Delft University of Technology

14. Den Besten, J.H. Fatigue resistance of welded joints in aluminium high-speed craft: A total stress concept.

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4

► Crew transfers, surveillance duties and {security, rescue, interception} operations at sea typically require high-speed craft. Aluminium is quite often selected as hull structure material because… (more)

▼ Crew transfers, surveillance duties and {security, rescue, interception} operations at sea typically require high-speed craft. Aluminium is quite often selected as hull structure material because of its weight save potential in comparison to steel. The fatigue strength, however, may become a point of concern because of the decreased Young’s modulus. Bottom slamming is identified as a dominant type of repeated loading, meaning fatigue is a governing limit state in aluminium high-speed craft design. Particular attention in that respect is paid to arc-welded joints connecting the hull structure components, {plates, shells}, since the weld geometry introduces notches; fatigue sensitive locations. Fatigue physics cover an extensive range of scales and modelling may require a multi-scale approach. Adopting a structural response parameter S available at FSS level using global information only, however, seems attractive since S controls plasticity – required to facilitate fatigue damage: crack initiation, growth, propagation and fracture – at macro (structural)- as well as meso and micro (material) scale, but pays off in fatigue resistance data scatter and life time estimate uncertainty. Including physics at smaller scale, local information, improves the accuracy. A continuous increase of the considered scale range of physics as observed in fatigue assessment concepts developed over time – proposed to be classified according to approach, criterion, parameter and process zone – is however typically associated to increased (computational) effort and concept complexity. At the same time, similarity; proper scaling, meaning equal parameter values should yield the same fatigue resistance, seems still incomplete since all concepts available involve multiple fatigue resistance curves rather than one. From {MCF, HCF} design perspective, a local continuum mechanics approach seems sufficient and a total stress concept is proposed to balance accuracy, effort and complexity, improving similarity at the same time to obtain one aluminium arc-welded joint fatigue resistance curve. The weld geometry introduces at least a notch at the weld toe and depending on penetration level another one at the weld root. Cracks may initiate at both fatigue sensitive locations, grow principally in {plate, shell} thickness direction and continue to propagate in general either along or perpendicular to the weld seam through {plate, shell} because of the structure orthotropic stiffness characteristics, suggesting a {plate, shell} thickness based (detectable repair) criterion to be an appropriate fatigue design parameter. The total through-thickness weld notch stress distribution along the expected crack path {??_n?^T,??_nr?^T }, including both the ocean/sea waves induced cyclic remote mechanical loading- and welding process related quasi-constant thermal residual part, is assumed to be a key element. The predominant remote mechanical loading mode-I contribution {?_n,?_nr } has been examined to distinguish the involved stress components. A self-equilibrating… Advisors/Committee Members: Kaminski, M.L., Huijsmans, R.H.M..

Subjects/Keywords: high-speed craft; aluminium; fatigue; welded joint; total stress concept

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Den Besten, J. H. (2015). Fatigue resistance of welded joints in aluminium high-speed craft: A total stress concept. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4

Chicago Manual of Style (16^th Edition):

Den Besten, J H. “Fatigue resistance of welded joints in aluminium high-speed craft: A total stress concept.” 2015. Doctoral Dissertation, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4.

MLA Handbook (7^th Edition):

Den Besten, J H. “Fatigue resistance of welded joints in aluminium high-speed craft: A total stress concept.” 2015. Web. 18 Jan 2021.

Vancouver:

Den Besten JH. Fatigue resistance of welded joints in aluminium high-speed craft: A total stress concept. [Internet] [Doctoral dissertation]. Delft University of Technology; 2015. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4.

Council of Science Editors:

Den Besten JH. Fatigue resistance of welded joints in aluminium high-speed craft: A total stress concept. [Doctoral Dissertation]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; urn:NBN:nl:ui:24-uuid:370b3d44-f4a6-403e-9629-d36174c3aca4 ; http://resolver.tudelft.nl/uuid:370b3d44-f4a6-403e-9629-d36174c3aca4

15. Fergen, Pamela Sue. Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process.

Degree: PhD, Mechanical Engineering, 2009, Old Dominion University

URL: 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118

► In the early stages of design when data availability is limited, engineers often times rely upon experience and regression analysis to select the most… (more)

▼ In the early stages of design when data availability is limited, engineers often times rely upon experience and regression analysis to select the most suitable design equation among many competitive ones. This study presents an alternative that applies a modified Analytical Hierarchy Process (AHP) to select the most suitable design equation. The Analytical Hierarchy Process, a multi-criteria decision making method, has been utilized in the business and management world to collect and evaluate experts' opinions in order to arrive at a final decision. The Analytical Hierarchy Process employed here will treat each of the design equations as an expert and allow the decision maker to evaluate and weight the opinions of the experts. Selecting an impact pressure equation among seven semi-empirical and three classification societies' design equations for planing hull design is used as an example to facilitate the study presented in this dissertation. The criteria and their associated weights that make up the decision making hierarchy of the Analytical Hierarchy Process are first established, with which the overall weighting coefficients can be computed to rank the candidate design equations. A preview sensitivity analysis is applied to screen out unfavorable design equations. The Analytical Hierarchy Process is then applied to select the most suitable impact pressure equation for twenty planing hulls. Next, a post sensitivity analysis is applied to ensure the robustness of the decision process. The results of such selection are compared with those of full scale test data. The implemented Analytical Hierarchy Process accurately selects the optimal pressure equation for fifteen of the twenty test cases. While it fails to select the best pressure design equation for the other five cases, it does provide recommendations that can lead to the selection of the right design equation. This study has demonstrated that the Analytical Hierarchy Process holds potential to be effective not only in selecting a suitable pressure equation for planing hull design but also in finding the strengths and the weaknesses of each of the pressure equations under consideration. Advisors/Committee Members: Gene Hou, Han Bao, Anthony Dean.

Subjects/Keywords: High-speed craft; Planing hull design; Pressure equation; Navel engineering; Mechanical Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fergen, P. S. (2009). Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118

Chicago Manual of Style (16^th Edition):

Fergen, Pamela Sue. “Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process.” 2009. Doctoral Dissertation, Old Dominion University. Accessed January 18, 2021. 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118.

MLA Handbook (7^th Edition):

Fergen, Pamela Sue. “Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process.” 2009. Web. 18 Jan 2021.

Vancouver:

Fergen PS. Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process. [Internet] [Doctoral dissertation]. Old Dominion University; 2009. [cited 2021 Jan 18]. Available from: 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118.

Council of Science Editors:

Fergen PS. Selection of Pressure Equation for Preliminary Planing Hull Design Using Modified Analytical Hierarchy Process. [Doctoral Dissertation]. Old Dominion University; 2009. Available from: 9781109566321 ; https://digitalcommons.odu.edu/mae_etds/118

Delft University of Technology

16. Bonci, M. The manoeuvrability of high-speed craft in the following sea.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; 843b41a4-fb9f-4211-8280-5767a03146eb ; 10.4233/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:isbn:978-94-6366-212-3 ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb

► Broaching-to is a highly complex, non-linear dynamic instability event that several vessels might face when sailing in the same direction of the waves, for example… (more)

Subjects/Keywords: Manoeuvrability-in-waves; high-speed craft; broaching-to; following sea; captive model tests; panel method

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bonci, M. (2019). The manoeuvrability of high-speed craft in the following sea. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; 843b41a4-fb9f-4211-8280-5767a03146eb ; 10.4233/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:isbn:978-94-6366-212-3 ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb

Chicago Manual of Style (16^th Edition):

Bonci, M. “The manoeuvrability of high-speed craft in the following sea.” 2019. Doctoral Dissertation, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; 843b41a4-fb9f-4211-8280-5767a03146eb ; 10.4233/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:isbn:978-94-6366-212-3 ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb.

MLA Handbook (7^th Edition):

Bonci, M. “The manoeuvrability of high-speed craft in the following sea.” 2019. Web. 18 Jan 2021.

Vancouver:

Bonci M. The manoeuvrability of high-speed craft in the following sea. [Internet] [Doctoral dissertation]. Delft University of Technology; 2019. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; 843b41a4-fb9f-4211-8280-5767a03146eb ; 10.4233/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:isbn:978-94-6366-212-3 ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb.

Council of Science Editors:

Bonci M. The manoeuvrability of high-speed craft in the following sea. [Doctoral Dissertation]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; 843b41a4-fb9f-4211-8280-5767a03146eb ; 10.4233/uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; urn:isbn:978-94-6366-212-3 ; urn:NBN:nl:ui:24-uuid:843b41a4-fb9f-4211-8280-5767a03146eb ; http://resolver.tudelft.nl/uuid:843b41a4-fb9f-4211-8280-5767a03146eb

University of New Orleans

17. Zhou, Zhengquan. A Theory and Analysis of Planing Catamarans in Calm and Rough Water.

Degree: PhD, Naval Architecture and Marine Engineering, 2003, University of New Orleans

URL: https://scholarworks.uno.edu/td/28

► A planing catamaran is a high-powered, twin-hull water craft that develops the lift which supports its weight, primarily through hydrodynamic water pressure. Presently, there is… (more)

▼ A planing catamaran is a high-powered, twin-hull water craft that develops the lift which supports its weight, primarily through hydrodynamic water pressure. Presently, there is increasing demand to further develop the catamaran's planing and seakeeping characteristics so that it is more effectively applied in today's modern military and pleasure craft, and offshore industry supply vessels. Over the course of the past ten years, Vorus (1994,1996,1998,2000) has systematically conducted a series of research works on planing craft hydrodynamics. Based on Vorus' planing monohull theory, he has developed and implemented a first order nonlinear model for planing catamarans, embodied in the computer code CatSea. This model is currently applied in planing catamaran design. However, due to the greater complexity of the catamaran flow physics relative to the monohull, Vorus's (first order) catamaran model implemented some important approximations and simplifications which were not considered necessary in the monohull work. The research of this thesis is for relieving the initially implemented approximations in Vorus's first order planing catamaran theory, and further developing and extending the theory and application beyond that currently in use in CatSea. This has been achieved through a detailed theoretical analysis, algorithm development, and careful coding. The research result is a new, complete second order nonlinear hydrodynamic theory for planing catamarans. A detailed numerical comparison of the Vorus's first order nonlinear theory and the second order nonlinear theory developed here is carried out. The second order nonlinear theory and algorithms have been incorporated into a new catamaran design code (NewCat). A detailed mathematical formulation of the base first order CatSea theory, followed by the extended second order theory, is completely documented in this thesis. Advisors/Committee Members: Vorus, William, Wei, Dongming, Falzarano, Jeffrey.

Subjects/Keywords: vortex strength distribution; random wave; nonlinear wave; high speed jet flow; water jet; fast ship; vessel design; drag and resistance dynamic lift; high speed craft; Planing craft; planing boat; impact hydrodynamics; steady planing; seakeeping; slender body theory; time marching; singular integral; special function; ship motion

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhou, Z. (2003). A Theory and Analysis of Planing Catamarans in Calm and Rough Water. (Doctoral Dissertation). University of New Orleans. Retrieved from https://scholarworks.uno.edu/td/28

Chicago Manual of Style (16^th Edition):

Zhou, Zhengquan. “A Theory and Analysis of Planing Catamarans in Calm and Rough Water.” 2003. Doctoral Dissertation, University of New Orleans. Accessed January 18, 2021. https://scholarworks.uno.edu/td/28.

MLA Handbook (7^th Edition):

Zhou, Zhengquan. “A Theory and Analysis of Planing Catamarans in Calm and Rough Water.” 2003. Web. 18 Jan 2021.

Vancouver:

Zhou Z. A Theory and Analysis of Planing Catamarans in Calm and Rough Water. [Internet] [Doctoral dissertation]. University of New Orleans; 2003. [cited 2021 Jan 18]. Available from: https://scholarworks.uno.edu/td/28.

Council of Science Editors:

Zhou Z. A Theory and Analysis of Planing Catamarans in Calm and Rough Water. [Doctoral Dissertation]. University of New Orleans; 2003. Available from: https://scholarworks.uno.edu/td/28

18. Wright, Mark T. Flame Spread on Composite Materials for use in High Speed Craft.

Degree: MS, 1999, Worcester Polytechnic Institute

URL: etd-110599-160802 ; https://digitalcommons.wpi.edu/etd-theses/1077

► "The use of advanced materials in the construction of high-speed craft is becoming more commonplace. However, there are certain requirements set in the High Speed… (more)

Subjects/Keywords: composite materials; flame height; flame spread; heat flux map; CFAST; radiation network; IMO; computer model; ISO 9705; High-speed craft; Flame spread; Composite materials; Fires and fire prevention; Shipbuilding; Materials; Fires and fire prevention

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wright, M. T. (1999). Flame Spread on Composite Materials for use in High Speed Craft. (Thesis). Worcester Polytechnic Institute. Retrieved from etd-110599-160802 ; https://digitalcommons.wpi.edu/etd-theses/1077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wright, Mark T. “Flame Spread on Composite Materials for use in High Speed Craft.” 1999. Thesis, Worcester Polytechnic Institute. Accessed January 18, 2021. etd-110599-160802 ; https://digitalcommons.wpi.edu/etd-theses/1077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wright, Mark T. “Flame Spread on Composite Materials for use in High Speed Craft.” 1999. Web. 18 Jan 2021.

Vancouver:

Wright MT. Flame Spread on Composite Materials for use in High Speed Craft. [Internet] [Thesis]. Worcester Polytechnic Institute; 1999. [cited 2021 Jan 18]. Available from: etd-110599-160802 ; https://digitalcommons.wpi.edu/etd-theses/1077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wright MT. Flame Spread on Composite Materials for use in High Speed Craft. [Thesis]. Worcester Polytechnic Institute; 1999. Available from: etd-110599-160802 ; https://digitalcommons.wpi.edu/etd-theses/1077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations