Accession Number : ADA254468


Title :   An Inferential Treatment of Resonance Scattering from Elastic Shells


Descriptive Note : Final rept.


Corporate Author : NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS


Personal Author(s) : Werby, M F ; Ueberall, H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254468.pdf


Report Date : 06 Mar 1992


Pagination or Media Count : 11


Abstract : One can extract both the existence and nature of resonances on elastic shells by direct measurement of surface vibrations or one may infer this information by examining various aspects of farfield scattering via back scattered echo's and residual bistatic angular distributions. The origin of the inferential method is contained in the prodigious work of Uberall over the past decades. In this study the later technique is taken and an analysis for recently studied resonances is presented. Use is made of the recently formulated acoustic background for elastic shells which makes it possible to examine residual back scattered echo's characterized by pure resonance effects. One observes the lowest order symmetric and antisymmetric model or Lamb resonances as well as water borne and pseudo-Stoneley resonances and the higher order Lamb modes Ai and Si where i = 1,2,3... Use of partial wave analysis will be made to investigate several relevant cases which infer the nature of the resonances. Acoustic scattering, shallow water, waveguide propagation.


Descriptors :   *ACOUSTIC RESONANCE , *ELASTIC SHELLS , PROPAGATION , REPRINTS , MEASUREMENT , SCATTERING , VIBRATION , SYMPOSIA , MODELS , DISTRIBUTION , RESONANCE SCATTERING , WAVEGUIDES , SHELLS(STRUCTURAL FORMS) , SURFACES , SHALLOW WATER , ECHOES , WAVE PROPAGATION , RESIDUALS , RESONANCE , BACKGROUND , ACOUSTIC SCATTERING


Subject Categories : Structural Engineering and Building Technology
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE