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You searched for +publisher:"University of Alabama" +contributor:("Mahmoodi, Seyed N."). One record found.

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University of Alabama

1. Kavanaugh, Joshua Stephen. Dynamics of vacuum-sealed, double-leaf partitions.

Degree: 2015, University of Alabama

The goal of this research is to investigate the feasibility and potential effectiveness of using vacuum-sealed, double-leaf partitions for applications in noise control. Substantial work has been done previously on double-leaf partitions where the acoustics of the inner chamber and mechanical vibrations of structural supports are passively and actively controlled. The work presented here is unique in that the proposed system aims to eliminate the need for active acoustic control of transmitted acoustic energy by removing all the air between the two panels of the double partition. Therefore, the only remaining energy paths would be along the boundary and at the points where there are intermediate structural supports connecting the two panels. The eventual goal of the research is to develop a high-loss double-leaf partition that simplifies active control by removing the need for control of the air cavity and channeling all the energy into discrete structural paths. The work presented here is a first step towards the goal of designing a high-loss, actively-controlled double-leaf partition with an air-evacuated inner chamber. One experiment is conducted to investigate the effects of various levels of vacuum on the response of a double-leaf partition whose panels are mechanically coupled only at the boundary. Another experiment is conducted which investigates the effect of changing the stiffness of an intermediate support coupling the two panels of a double-leaf partition in which a vacuum has been applied to the inner cavity. The available equipment was able to maintain a 99% vacuum between the panels. Both experiments are accompanied by analytical models used to investigate the importance of various dynamic parameters. Results show that the vacuum-sealed system shows some potential for increased transmission loss, primarily by the changing the natural frequencies of the double-leaf partition. (Published By University of Alabama Libraries) Advisors/Committee Members: Shepard, William S., Mahmoodi, Seyed N., Hubner, James P., University of Alabama. Dept. of Mechanical Engineering.

Subjects/Keywords: Electronic Thesis or Dissertation;  – thesis; Mechanical engineering; Acoustics; Virology; acoustics; double-leaf partition; noise control; passive control; vacuum

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

APA (6th Edition):

Kavanaugh, J. S. (2015). Dynamics of vacuum-sealed, double-leaf partitions. (Thesis). University of Alabama. Retrieved from http://purl.lib.ua.edu/131945

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):

Kavanaugh, Joshua Stephen. “Dynamics of vacuum-sealed, double-leaf partitions.” 2015. Thesis, University of Alabama. Accessed August 14, 2020. http://purl.lib.ua.edu/131945.

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

MLA Handbook (7th Edition):

Kavanaugh, Joshua Stephen. “Dynamics of vacuum-sealed, double-leaf partitions.” 2015. Web. 14 Aug 2020.

Vancouver:

Kavanaugh JS. Dynamics of vacuum-sealed, double-leaf partitions. [Internet] [Thesis]. University of Alabama; 2015. [cited 2020 Aug 14]. Available from: http://purl.lib.ua.edu/131945.

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

Council of Science Editors:

Kavanaugh JS. Dynamics of vacuum-sealed, double-leaf partitions. [Thesis]. University of Alabama; 2015. Available from: http://purl.lib.ua.edu/131945

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

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