This paper examines guided wave transmission characteristics of plate stiffeners and their influence on the performance of acoustic noise source location. The motivation for this work is the detection of air leaks in manned spacecraft. The leaking air is turbulent and generates noise that can be detected by a contact-coupled acoustic array to perform source location and find the air leak. Transmission characteristics of individual integral stiffeners are measured across a frequency range of 50-400 kHz for both high and low aspect-ratio rectangular stiffeners, and comparisons are made to model predictions which display generally good agreement. It is demonstrated that operating in frequency ranges of high plate wave stiffener transmission significantly improves the reliability of noise source location in the plate. A protocol is presented to enable the selection of an optimal frequency range for leak location.


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    Titel :

    Guided plate wave scattering at vertical stiffeners and its effect on source location


    Weitere Titelangaben:

    Geführte Plattenwellenstreuung an vertikalen Versteifungen und ihr Einfluss auf Quellenortungen


    Beteiligte:
    Reusser, R.S. (Autor:in) / Chimenti, D.E. (Autor:in) / Roberts, R.A. (Autor:in) / Holland, S.D. (Autor:in)

    Erschienen in:

    Ultrasonics ; 52 , 6 ; 687-693


    Erscheinungsdatum :

    2012


    Format / Umfang :

    7 Seiten, 8 Bilder, 30 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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