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You searched for subject:(Fordonsdynamik). Showing records 1 – 3 of 3 total matches.

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Luleå University of Technology

1. Hellman, Andreas. Simulation of complete vehicle dynamics using FE code Abaqus.

Degree: 2008, Luleå University of Technology

På grund av höga kostnader för att utveckla nya fordonsmodeller så blir datorsimuleringar av fordonsdynamik allt viktigare i produktutvecklingsprocessen. Fordonsdynamik är i dag ett smalt område på marknaden, vilket innebär att det är oekonomiskt för de flesta mindre företag att äga licenser för de programvaror som krävs för dessa simuleringar då de endast används tillfälligt. Program för att beräkna hållfasthet är betydligt vanligare ute i industrin idag och om möjligheten fanns att simulera fordonsdynamik med hjälp av en sådan programvara skulle detta kunna möjliggöra stora besparingar och nya möjligheter. Alla kommersiella hållfasthetskoder har inte funktionaliteten att räkna stelkroppsdynamik dvs när en kropps rörelser är stora i relation till dimensionerna på delarna. En hållfasthetsprogramvara som har detta inkluderat är Abaqus. Examensarbetet undersöker om det är möjligt att göra handling och åkkomfortsimuleringar i Abaqus som ger lika trovärdiga resultat som i ett för ändamålet anpassat program. Som referens har ADAMS/Car från MSC.Software valts pga. av att det är en av de vanligaste programvaror som används idag inom fordonsdynamiska beräkningar. Handlingsimulering av fordon innebär olika typ av kurvtagningsmanövrar. Åkkomfortsimulering innebär simulering av vad olika ojämnheter i vägen ger upphov till för vibrationer. En helbilsmodell av Volvo S40 modelleras och simuleras i både Abaqus och ADAMS/Car och resultaten jämförs mot varandra. I Abaqus har även layouten på hur modeller och simuleringar skall byggas upp för att möjliggöra en så bra struktur av filerna som möjligt undersökts. För att kunna lösa ett så här pass komplext problem och få goda resultat är en väl genomtänkt strategi nödvändig och för detta ändamål har Crawl-Walk-Run strategin använts. Från resultatet kan slutsatsen dras att Abaqus kan bli ett fullgott alternativ till simuleringar av fordonsdynamik. Det fungerar bra för att simulera enkla åkkomfortsimuleringar men för att möjliggöra handlingsimuleringar krävs vidare arbete för att utveckla fungerande däckmodeller. Överensstämmelsen mellan resultaten från Abaqus och ADAMS/Car är god och tillräckligt noggrann för att börja användas till att lösa verkliga problem. Fortsatt förbättring i överensstämmelsen mellan programmen är något för framtida arbete.

Validerat; 20101217 (root)

Subjects/Keywords: Technology; Abaqus; Vehicle Dynamics; ADAMS/Car; Fordonsdynamik; Teknik

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

APA (6th Edition):

Hellman, A. (2008). Simulation of complete vehicle dynamics using FE code Abaqus. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55278

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

Chicago Manual of Style (16th Edition):

Hellman, Andreas. “Simulation of complete vehicle dynamics using FE code Abaqus.” 2008. Thesis, Luleå University of Technology. Accessed April 12, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55278.

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

MLA Handbook (7th Edition):

Hellman, Andreas. “Simulation of complete vehicle dynamics using FE code Abaqus.” 2008. Web. 12 Apr 2021.

Vancouver:

Hellman A. Simulation of complete vehicle dynamics using FE code Abaqus. [Internet] [Thesis]. Luleå University of Technology; 2008. [cited 2021 Apr 12]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55278.

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

Council of Science Editors:

Hellman A. Simulation of complete vehicle dynamics using FE code Abaqus. [Thesis]. Luleå University of Technology; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55278

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


KTH

2. Rafael, Jose Manuel Sala De. Development of an On-line Ride Comfort Evaluation Tool.

Degree: Aeronautical and Vehicle Engineering, 2008, KTH

To produce competitive vehicles, their comfort is one important issue to take into account during the development process. The aim of this Master Thesis is to develop an on-line comfort evaluation tool in order to improve research and education in the field of vehicle comfort at the division of Vehicle Dynamics at the Royal Institute of Technology. Based on ISO standards concerning comfort an on-line evaluation tool has been developed using DASYLab, which is a software that allows creation of acquisition, control, simulation and analysis tasks. The developed tool has been evaluated by performing measurements of a VOLVO V40 equipped with sensors. Different sorts of surfaces and driving conditions have been investigated, and from this investigation one can conclude that the comfort tool works properly.

Subjects/Keywords: Vehicle Dynamics; Ride comfort; ISO 2631; Fordonsdynamik; komfort; Vehicle engineering; Farkostteknik

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

APA (6th Edition):

Rafael, J. M. S. D. (2008). Development of an On-line Ride Comfort Evaluation Tool. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4827

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

Chicago Manual of Style (16th Edition):

Rafael, Jose Manuel Sala De. “Development of an On-line Ride Comfort Evaluation Tool.” 2008. Thesis, KTH. Accessed April 12, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4827.

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

MLA Handbook (7th Edition):

Rafael, Jose Manuel Sala De. “Development of an On-line Ride Comfort Evaluation Tool.” 2008. Web. 12 Apr 2021.

Vancouver:

Rafael JMSD. Development of an On-line Ride Comfort Evaluation Tool. [Internet] [Thesis]. KTH; 2008. [cited 2021 Apr 12]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4827.

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

Council of Science Editors:

Rafael JMSD. Development of an On-line Ride Comfort Evaluation Tool. [Thesis]. KTH; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4827

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

3. Lundberg, Petter. Investigation of the transient nature of rolling resistance on an operating Heavy Duty Vehicle.

Degree: Physics, 2014, Umeå University

An operating vehicle requires energy to oppose the subjected driving resistances. This energy is supplied via the fuel combustion in the engine. Decreasing the opposing driving resistances for an operating vehicle increases its fuel efficiency: an effect which is highly valued in today’s industry, both from an environmental and economical point of view. Therefore a lot of progress has been made during recent years in the area of fuel efficient vehicles, even though some driving resistances still rises perplexity. These resistances are the air drag Fd generated by the viscous air opposing the vehicles propulsion and the rolling resistance Frr generated mainly by the hysteresis caused by the deformation cycle of the viscoelastic pneumatic tires. The energy losses associated with the air drag and rolling resistance account for the majority of the driving resistances facing an operating vehicle, and depends on numerous stochastic and ambient parameters, some of which are highly correlated both within and between the two resistances. To increase the understanding of the driving mechanics behind the energy losses associated with the complexity that is rolling resistance, a set of complete vehicle tests has been carried out. These tests were carried out on the test track Malmby Fairground, using a Scania CV AB developed R440 truck equipped with various sensors connected in one measurement system. Under certain conditions, these parameters can allow for an investigation of the rolling resistance, and a separation of the rolling resistance and air drag via explicit subtraction of the air drag from the measured traction force. This method is possible since the aerodynamic property AHDVCd(β) to some extent can be generated from wind tunnel tests and CFD simulations. Two measurement series that enable the above formulated method of separation were designed and carried out, using two separate measurement methods. One which enables the investigation of the transient nature of rolling resistance as it strives for stationarity, where the vehicle is operated under constant velocities i.e. no acceleration, and one using the well established method of coastdown, where no driving torque is applied. The drive cycles spanned a range of velocities, which allowed for dynamic and stationary analyses of both the tire temperature- and the velocity dependence of rolling resistance. When analysing the results of the transient analysis, a strong dependence upon tire temperature for given constant low velocity i.e. v ≤ 60 kmh−1 was clearly visible. The indicated dependency showed that the rolling resistance decreased as the tire temperature increased over time at a given velocity, and vice versa, towards a stationary temperature and thereby rolling resistance. The tire temperature evolution from one constant velocity to another, took place well within 50 min to a somewhat stationary value. However, even though the tire temperature had reached stationarity, rolling…

Subjects/Keywords: Rolling resistance; Air drag; Heavy Duty Vehicles; Vehicle dynamics; Complete vehicle test; Coastdown; Effective radius; ACEA; Pneumatic tires; Driving resistances; Energy efficiency; Rullmotstånd; Luftmotstånd; Tunga fordon; Fordonsdynamik; Helfordonstest; Utrullningstest; Effektiv radie; ACEA; Pneumatiska däck; Körmotstånd; Energieffektivitet.

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

APA (6th Edition):

Lundberg, P. (2014). Investigation of the transient nature of rolling resistance on an operating Heavy Duty Vehicle. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93298

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

Chicago Manual of Style (16th Edition):

Lundberg, Petter. “Investigation of the transient nature of rolling resistance on an operating Heavy Duty Vehicle.” 2014. Thesis, Umeå University. Accessed April 12, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93298.

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

MLA Handbook (7th Edition):

Lundberg, Petter. “Investigation of the transient nature of rolling resistance on an operating Heavy Duty Vehicle.” 2014. Web. 12 Apr 2021.

Vancouver:

Lundberg P. Investigation of the transient nature of rolling resistance on an operating Heavy Duty Vehicle. [Internet] [Thesis]. Umeå University; 2014. [cited 2021 Apr 12]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93298.

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

Council of Science Editors:

Lundberg P. Investigation of the transient nature of rolling resistance on an operating Heavy Duty Vehicle. [Thesis]. Umeå University; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93298

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

.