ASA 124th Meeting New Orleans 1992 October

3aUW13. Combination of Gaussian beam optimization and finite element method in describing underwater distributed source sound field in an inhomogeneous medium.

Dehua Huang

M. A. Breazeale

Natl. Ctr. for Phys. Acoust., Univ. of Mississippi, University, MS 38677

A non-Green's function integral method---the Gaussian beam optimization superposition representation [Wen and Breazeale, J. Acoust. Soc. Am. 83, 1752--1756 (1988)], combined with the finite element solution to the parabolic wave equation [Huang, J. Acoust. Soc. Am. 84, 1405--1413 (1988)], has been developed to treat the underwater diffraction field of a distributed source. The numerical examples cover Gaussian and multiple Gaussian sources, homogeneous and inhomogeneous media, high- and low-frequency range, and regular or irregular interface boundaries.