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A reduction method for structure-acoustic and poroelastic-acoustic problems using interface-dependent Lanczos vectors

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Author

Summary, in English

A reduction method is proposed for analysing structure-acoustic and poroelastic-acoustic problems within a finite element framework. This includes systems consisting of an acoustic fluid domain coupled to a flexible structural domain and/or a porous sound absorbing material domain. The studied problem is reduced by dividing the system into a number of physical subdomains. A set of basis vectors is derived for each of these subdomains, including both normal modes and interface-dependent vectors that take account of the influence of connecting subdomains. The method is verified in two numerical examples using the proposed method for both solving the structure-acoustic eigenvalue problem and performing a frequency response analysis in an acoustic cavity with one wall covered by porous material. (c) 2005 Elsevier B.V. All rights reserved.

Publishing year

2006

Language

English

Pages

1933-1945

Publication/Series

Computer Methods in Applied Mechanics and Engineering

Volume

195

Issue

17-18

Document type

Journal article

Publisher

Elsevier

Topic

  • Mechanical Engineering

Keywords

  • poroclastic
  • structure-acoustic
  • component mode synthesis
  • Biot's theory

Status

Published

ISBN/ISSN/Other

  • ISSN: 0045-7825