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Santiago, J. A. F.; Wrobel, L. C. The subregion technique applied to acoustic wave propagation in shallow water. Revista de Engenharia: Estudo e Pesquisa, Juiz de Fora, v. 3, n. 2, p. 93-9, jul./dez. 2000.
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Abstract

This article deals with the numerical simulation of acoustic wave propagation in shallow water by the boundary element method. It is assumed that the source of acoustic disturbance is time-harmonic, the velocity of sound is constant and the medium in the absence of perturbations is quiescent. The subregions technique is implemented to solve general propagation problems with irregular seabed topography. Therefore, only the irregular parts of the bottom and interfaces need to be discretized. The BEM model makes use of two modified Green's functions, one of which satisfies the free surface boundary condition while the other directly satisfies the boundary conditions on the free surface and the horizontal pan of the bottom boundary. Alternatively, a Green's function in the form of eigenfunction expansions is employed to improve the convergence characteristics of the latter.
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