ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06
2aSA6. Elastic scattering of a spherical acoustic wave by an infinite
fluid-filled cylindrical shell.
Stirling S. Dodd
Charles M. Loeffler
Advanced Sonar Group, Appl. Res. Lab., Univ. of Texas at Austin, P.O. Box
8029, Austin, TX 78713-8029
A method of describing spherical acoustic waves in cylindrical coordinates
is applied to the problem of point source scattering by an elastic infinite
fluid-filled cylindrical shell. Leon et al. developed the scattering matrix for
plane-wave scattering by an infinite hollow cylindrical shell [Leon et al.,
1388--1397 (1992)]. By using a method of expressing a spherical wave
in cylindrical coordinates in a form similar to that of a plane wave in
cylindrical coordinates [Li and M. Ueda, 1871--1879 (1990)], the
result of Leon et al. is manipulated into an exact solution for the spherical
wave, fluid-filled scattering problem. The exact solution is in an integral
form that is treated numerically. It is applied to distributed source and
receiver arrays by treating them as sets of point sources and point receivers
and then integrating over their spatial extent.