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论文类型：期刊论文

发表时间：2013-10-22

发表刊物：WIT Transactions on Modelling and Simulation

收录刊物：EI

卷号：56

页面范围：353-363

ISSN号：1743355X

摘要：The aim of this paper is to present an efficient adaptive integration technique to perform near-field acoustics boundary element analysis, in which nearly singular integrals will be encountered as the source point in integral equations is close to the boundary of the acoustic domain. At this time the integrand varies sharply, so the conventional Gaussian quadrature becomes inefficient or even inaccurate. In this paper, an adaptive integration technique is proposed, which determines required Gauss orders and the number of sub-elements according to the specified integration accuracy and the relative position from the source point in integral equations to the element under integration. Two numerical examples have been presented to demonstrate the efficiency and accuracy of the proposed approach. © 2013 WIT Press.