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    A detailed experimental modal analysis of a clamped circular plate

    Access Status
    Fulltext not available
    Authors
    Matthews, D.
    Sun, H.
    Saltmarsh, K.
    Wilkes, Daniel
    Munyard, A.
    Pan, J.
    Date
    2014
    Type
    Conference Paper
    
    Metadata
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    Citation
    Matthews, D. and Sun, H. and Saltmarsh, K. and Wilkes, D. and Munyard, A. and Pan, J. 2014. A detailed experimental modal analysis of a clamped circular plate, in T. McMinn (ed), Inter-noise: 43rd International Congress on Noise and Control Engineering, Nov 16 2014. Melbourne, Australia: Australian Acoustical Society.
    Source Title
    Proceedings of the 43rd International Congress on Noise and Control Engineering
    Source Conference
    43rd International Congress on Noise and Control Engineering
    Additional URLs
    http://www.acoustics.asn.au/conference_proceedings/INTERNOISE2014/papers/p237.pdf
    School
    Centre for Marine Science and Technology
    URI
    http://hdl.handle.net/20.500.11937/13504
    Collection
    • Curtin Research Publications
    Abstract

    A detailed study has been made of the natural frequencies and modal shapes of a thin steel discthat is clamped at the edges by two steel flanges. The aim was to determine how accuratelynumerical modeling could be used to predict the results and to investigate the possibility of any newexperimental observations even for this simple structure. A mechanical shaker and impact hammerwere used to excite the plate to obtain the frequency response function of the structure. The firsteight modal shapes at each of the resonant frequencies were then measured using laser scanningvibrometry. These results were compared with theoretical results obtained analytically andnumerically using PAFEC. While part of the existing understanding of the plate vibration wasconfirmed, significant differences were found in the values of the modal frequencies. Theexperimental data also demonstrated a dependence of the mode shape orientations and splitting ofdegenerated natural frequencies on the shaker position and properties of the flanges. This paperwill report on some interesting effects that need to be considered when doing such measurements and illustrate the risks of using numerical modeling without the use of experimental comparison.

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