ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06
5pUW2. Scattering of a transient plane compression wave by a spherical
inclusion in a Biot medium.
Hans Schantz
Morris Stern
Justin Beres
Appl. Res. Lab., Univ. of Texas, P.O. Box 8029, Austin, TX 78713-8029
The scattering of an arbitrary transient plane wave by a spherical
inclusion in a Biot medium is modeled, by applying the single frequency,
steady-state solution of Zimmerman and Stern [ 527--536 (1993)] to the
discrete Fourier components of the transient signal, and assuming linear
supersposition. The solution of Zimmerman and Stern is an analytical series
solution. Its accuracy is mainly determined by computation errors and the
convergence of the series. The incident pulse can be any combination of Biot
fast and low waves. The theoretical results for certain cases are shown. They
are also compared to experimental measurements. [Work supported by Naval
Research Laboratory, Stennis Space Center.]