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Modified Green’s functions for shallow water acoustic wave propagation. (English) Zbl 1074.76577
Summary: 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.

MSC:
76M15 Boundary element methods applied to problems in fluid mechanics
76Q05 Hydro- and aero-acoustics
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