Sound Scattering from Submerged Elastic Objects and Shells of General Shape.(Reannouncement with New Availability Information)

摘要

Three computational approaches have been used to obtain backscattering amplitudesfor 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.