ASA 128th Meeting - Austin, Texas - 1994 Nov 28 .. Dec 02

5aPA4. The study of pulse signals from elastic sporoidal shells near reflecting interfaces.

N. A. Sidorovskaia

Dept. of Phys., Univ. of New Orleans, New Orleans, LA

Cleon Dean

Georgia Southern Univ., Landrum, Statesburo, GA 30460

M. F. Werby

Naval Res. Lab., Stennis Space Center, MS

A formulation is presented that allows one to describe backscattered echoes from elastic shells near pressure release and rigid interfaces. This formulation is always consistent even at low frequencies and large distances from the interfaces and allows for the rapid reproduction of backscattered echoes over frequency ranges of practical interest. Numerical results are examined for pulse signals scattering from various targets as a function of target material, distance from the interface, and the effect that the two interface extremes have on the detected signals. [Work sponsored by NRL and ONR.]