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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24377

Title: Acoustic eigenanalysis for multiply-connected problems using dual BEM
Authors: J. T. Chen;L. W. Liu;S. W. Chyuan
Contributors: NTOU:Department of Harbor and River Engineering
Keywords: boundary element method;multiply-connected domain;singular value decomposition;Fredholm alternative theorem;CHIEF concept
Date: 2004-06
Issue Date: 2011-10-20T08:11:55Z
Publisher: Communications in Numerical Methods in Engineering
Abstract: Abstract:In this paper, the eigenanalysis for the multiply-connected domain problem is studied by using the dual boundary element method. The occurrence and treatment of the spurious eigenvalues for multiply-connected domain problem are reviewed when the complex-valued BEM in used. Three approaches, Burton and Miller method, CHIEF concept and SVD updating techniques, are adopted to suppress the occurrence of spurious eigensolutions. Instead of using the singular and hypersingular formulations, the singularity-free methods, the null-field equation approach and the fictitious BEM, are also utilized to deal with the eigenproblem. Both the eigenvalues and eigenmodes are compared with the analytical solutions and those of FEM for the illustrative examples. Good agreement is made. Copyright © 2004 John Wiley & Sons, Ltd.
Relation: 20(6), pp.419-440
URI: http://ntour.ntou.edu.tw/handle/987654321/24377
Appears in Collections:[河海工程學系] 期刊論文

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