Design approach for minimizing sound power from vibrating shell structures

E. W. Constans, A. D. Belegundu, G. H. Koopmann

    Research output: Contribution to journalArticlepeer-review

    30 Scopus citations

    Abstract

    A design approach for minimizing sound power radiation from vibrating thin shell structures is presented. The method couples finite element analysis for determining structural modes and vibrations with a boundary element/wave superposition code for determining sound power radiation. Noise reduction is accomplished herein by optimal placement and sizing of small point masses on the structure. These masses alter the critical mode shapes so as to reduce sound power. The simulated annealing technique is used to determine the location and/or magnitude of the point masses. A computer program has been developed for design. Design examples are presented with the use of the computer program.

    Original languageEnglish (US)
    Pages (from-to)134-139
    Number of pages6
    JournalAIAA Journal
    Volume36
    Issue number2
    DOIs
    StatePublished - Feb 1998

    All Science Journal Classification (ASJC) codes

    • Aerospace Engineering

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