Tutorial on the vibroacoustics of composite sandwich panels

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

Composite sandwich panels are used throughout the aerospace industry as lightweight, stiff structural components. While the vibroacoustic behavior of simple isotropic homogeneous panels are described in many textbooks and articles, the properties of composite sandwich panels are not as well documented. This tutorial describes basic analytic methods for estimating sandwich panel wavespeeds, modal frequencies, mobilities/conductances, and radiation resistances. Measured and simulated data from two example sandwich panels - a launch vehicle panel with free boundaries and a framed rotorcraft roof panel with simply supported boundary conditions - are shown to illustrate these concepts. Modal wavenumber analysis confirms the wavespeed estimating procedures. Mobility/conductance becomes dominated by shear waves at fairly low frequencies. Finally, the strong contribution of radiation damping to overall modal damping is evident in measured data.

Original languageEnglish (US)
Pages5579-5589
Number of pages11
StatePublished - Aug 21 2016
Event45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 - Hamburg, Germany
Duration: Aug 21 2016Aug 24 2016

Other

Other45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016
CountryGermany
CityHamburg
Period8/21/168/24/16

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Hambric, S. A. (2016). Tutorial on the vibroacoustics of composite sandwich panels. 5579-5589. Paper presented at 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016, Hamburg, Germany.