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

Publiceringsår: 2006
Språk: Engelska
Sidor: 1933-1945
Publikation/Tidskrift/Serie: Computer Methods in Applied Mechanics and Engineering
Volym: 195
Nummer: 17-18
Dokumenttyp: Artikel i tidskrift
Förlag: Elsevier


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.


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


  • ISSN: 0045-7825

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