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Indexed by:期刊论文

Date of Publication:2013-02-01

Journal:ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS

Included Journals:SCIE、EI

Volume:37

Issue:2

Page Number:409-418

ISSN No.:0955-7997

Key Words:BEM; pFFT; Hypersingular integral; Burton and Miller; Acoustic scattering

Abstract:The precorrected-FFT acceleration technique is successfully applied in the boundary element method for the simulation of 3-D acoustic scattering problems. The composite Helmholtz integral equation presented by Burton and Miller is employed to overcome the nonuniqueness problem occurring in the simulation of exterior acoustic problems by the boundary element method. Since the triangular constant element is employed, the hypersingular boundary integral equation is reduced into a weakly singular boundary integral equation with the application of a modified Burton and Miller's formulation. The computational cost, the consumed memory and the convergence of the current method are demonstrated and analyzed through the simulation of a plane acoustic wave scattering from a rigid sphere and from an axisymmetrical rigid structure. (C) 2012 Elsevier Ltd. All rights reserved.