Circumferential-wave phase velocities for empty, fluid-immersed spherical metal shells

Herbert Überall, A. Claude Ahyi, P. K. Raju, Irina Bjørnø, Leif Bjørnø Jensen

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    Abstract

    Our earlier studies regarding acoustic scattering resonances and the dispersive phase velocities of the surface waves that generate them, have demonstrated the effectiveness of obtaining phase velocity dispersion curves from the known acoustic resonance frequencies, and their accuracy. This possibility is offered by the picture of phase matching after each complete circumnavigation of these waves, which leads to close agreement of resonance results with those calculated from 3-D-elasticity theory whenever the latter are available. The present investigation is based on the mentioned resonance frequency/elasticity-theory connection, and we obtain comparative dispersion-curve results for water-loaded, evacuated spherical shells of various metals. In particular, the characteristic upturn of the dispersion curves of low-order shell-borne circumferential waves (A or A0 waves) which takes place on spherical shells when the frequency tends towards low values, is demonstrated here for all the metals under consideration.
    Original languageEnglish
    JournalAcoustical Society of America. Journal
    Volume109
    Issue number5
    Pages (from-to)2378-2379
    ISSN0001-4966
    Publication statusPublished - 2001

    Bibliographical note

    Copyright (2001) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

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