ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

5pUW3. Multiple scattering from submerged bodies with dissimilar acoustical properties. Part I. Local impedance models.

Gabriella Turek

Marine Phys. Lab., Scripps Inst. of Oceanogr., La Jolla, CA 92093-0238

Peter H. Rogers

Aldo A. Ferri

Georgia Inst. of Technol., Atlanta, GA 30332-0405

A numerical solution for a two-body acoustical multiple scattering problem based on the analytical infinite series solution of the wave equation was developed. FORTRAN 77 codes implementing this solution were written which are capable of simulating the case of two spheres of arbitrary radius and distinct material properties subject to an acoustic plane wave of arbitrary incidence. Far-field solutions involving permutations of the two ``degenerate'' boundary conditions (pressure release and rigid) were compared to solutions obtained with the combined Helmholtz integral equation formulation problem (CHIEF) program. Surface pressures and velocities were also calculated. [Work supported by ONR.]