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THE COUPLED NATURAL BOUNDARY-FINITE ELEMENT METHOD FOR SOLVING THE ACOUSTIC SCATTERING PROBLEM IN A 3D OCEANIC WAVEGUIDE

WENFENG PAN

School of Science, Wuhan University of Technology, Wuhan 430070, P. R. China

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and

ZHUOQIU LI

School of Science, Wuhan University of Technology, Wuhan 430070, P. R. China

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https://doi.org/10.1142/S0218396X08003646Cited by:2 (Source: Crossref)

Abstract

This study is concerned with the problem of acoustic scattering by a three-dimensional obstacle in a shallow water waveguide. A method coupling of the finite-element and natural boundary-element is analyzed and presented for solving the acoustic scattering problem numerically based on the Galerkin variational principle and the DtN mapping theory. The proposed method has the advantage of avoiding the absorbing boundary condition of the conventional finite-element method. Numerical examples are given of successful computational results for several 3D obstacles of various shapes.

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