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A finite element approach combining a reduced-order system, Pade approximants, and an adaptive frequency windowing for fast multi-frequency solution of poro-acoustic problems
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Numerical acoustics.ORCID iD: 0000-0002-6555-531X
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Numerical acoustics.ORCID iD: 0000-0003-1855-5437
Conservatoire National des Arts et Métiers, Paris France.
2014 (English)In: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 97, no 10, 759-784 p.Article in journal (Refereed) Published
Abstract [en]

In this work, a solution strategy is investigated for the resolution of multi-frequency structural-acoustic problems including 3D modeling of poroelastic materials. The finite element method is used, together with a combination of a modal-based reduction of the poroelastic domain and a Pade-based reconstruction approach. It thus takes advantage of the reduced-size of the problem while further improving the computational efficiency by limiting the number of frequency resolutions of the full-sized problem. An adaptive procedure is proposed for the discretization of the frequency range into frequency intervals of reconstructed solution. The validation is presented on a 3D poro-acoustic example.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2014. Vol. 97, no 10, 759-784 p.
Keyword [en]
structural-acoustics, dissipative interface, noise reduction, reduced-order model, Pade approximants, poroelastic materials
National Category
Mathematics Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-141955DOI: 10.1002/nme.4609ISI: 000330186100003ScopusID: 2-s2.0-84893698447OAI: oai:DiVA.org:kth-141955DiVA: diva2:699635
Note

QC 20140228. QC 20160212

Available from: 2014-02-28 Created: 2014-02-27 Last updated: 2016-02-12Bibliographically approved

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