Modified Green's functions for shallow water acoustic wave propagation

• Published in: Engineering analysis with boundary elements Vol. 28; no. 11; pp. 1375 - 1385
• Main Authors: SANTIAGO, J. A. F, WROBEL, L. C
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier 01.11.2004
• Subjects: Acoustics; Boundary-integral methods; Computational techniques; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Linear acoustics; Mathematical methods in physics; Physics; Underwater sound; Eigenfunction expansions; Free boundary; Fluid wave; Ewald's method; Sound source; Shallow water; Green function; Modeling; Horizontal surface; Image method; Sound velocity; Series expansion; Shallow water acoustics; Underwater acoustics; Sea surface wave; Surface conditions; Boundary element method
• ISSN: 0955-7997; 1873-197X
• DOI: 10.1016/j.enganabound.2004.04.004

This article presents an assessment of alternative forms of the Green's function for boundary element simulations of acoustic wave propagation in shallow water. It is assumed that the problem is two-dimensional, the source of acoustic disturbance is time-harmonic, the velocity of sound is constant and the medium in the absence of perturbations is quiescent. Efficient implementations of the boundary element method for underwater acoustics should employ Green's functions which directly satisfy the boundary conditions on the free surface and the horizontal parts of the bottom boundary. In the present work, these Green's functions are constructed by using different techniques, namely the method of images, eigenfunction expansions and the Ewald's method.