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Vibration analysis of a circular plate in interaction with an acoustic cavity leading to extraction of structural modal parameters

Gorman, Daniel G. and Trendafilova, Irina and Mulholland, Anthony J. and Horáček, Jaromir (2008) Vibration analysis of a circular plate in interaction with an acoustic cavity leading to extraction of structural modal parameters. Thin-Walled Structures, 46 (7-9). pp. 878-886. ISSN 0263-8231

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    Abstract

    When carrying out vibration health monitoring (VHM) of a structure it is usually assumed that the structure is in the absence of fluid interaction and that any environmental effects which can cause changes in natural frequency either remain constant or are negligible. In certain cases, this condition cannot be assumed and therefore it is necessary to extract values of natural frequencies of the structure for the condition with no fluid interaction from those values measured. This paper considers the case of a thin circular plate in contact with a fluid cavity giving rise to strong structural/fluid vibration interaction. The paper details the free vibration analysis of the coupled system and through consideration of modal energy, illustrates how the affined modes of vibration of the plate and the fluid can be qualitatively described. The paper then introduces a method by which the natural frequencies of the plate in the absence of fluid interaction can be obtained from those of the plate in interaction with the fluid.

    Item type: Article
    ID code: 5775
    Keywords: vibration, health monitoring, plates, vibration analysis, mechanical engineering, Mechanical engineering and machinery, Mathematics, Mechanical Engineering, Mechanics of Materials, Computational Mechanics, Acoustics and Ultrasonics, Metals and Alloys
    Subjects: Technology > Mechanical engineering and machinery
    Science > Mathematics
    Department: Faculty of Science > Mathematics and Statistics
    Faculty of Engineering > Mechanical and Aerospace Engineering
    Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 28 Mar 2008
    Last modified: 05 Sep 2014 00:24
    URI: http://strathprints.strath.ac.uk/id/eprint/5775

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