Accession Number : ADA260630


Title :   Sound Scattering from Submerged Elastic Objects and Shells of General Shape


Descriptive Note : Final rept.


Corporate Author : NAVAL RESEARCH LAB STENNIS SPACE CENTER MS


Personal Author(s) : Werby, Michael F ; Miller, Russel D ; Maze, Gerard ; Ripoche, Jean ; Bao, Xiao-Ling


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260630.pdf


Report Date : Jan 1993


Pagination or Media Count : 15


Abstract : Three computational approaches have been used to obtain backscattering amplitudes for sound waves incident on elastic objects and shells in water: the T-matrix method, the Finite element/Boundary element method, and the superposition method. These methods have been found appropriate for analyzing the resonance effects apparent in the scattering from spheroidal solids, as well as from cylindrical shells with flat endcaps. The resonances have been interpreted by the phase matching of circumferential waves, and a simple method for obtaining the resonance frequencies based on the phase matching principle H. Uberall, L. R. Dragonette, and L. Flax, J. Acoust. Soc. Am. 61, 711 (1977) has proved suitable for predicting the calculated resonances of spheroids.... Acoustic scattering, Shallow water, Waveguide propagation.


Descriptors :   *BACKSCATTERING , *SOUND WAVES , *ACOUSTIC SCATTERING , FREQUENCY , REPRINTS , SCATTERING , SHALLOW WATER , CYLINDRICAL BODIES , AMPLITUDE , ELASTIC SHELLS , UNDERWATER ACOUSTICS , SOUND , ACOUSTICS , RESONANCE , WAVE PROPAGATION , SPHERES , ACOUSTIC WAVES , WAVEGUIDES


Subject Categories : Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE