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A modal-based reduction method for sound absorbing porous materials in poro-acoustic finite element models
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0002-6555-531X
Conservatoire National des Arts et Métiers, Paris France.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0003-1855-5437
2012 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 132, no 5, 3162-3179 p.Article in journal (Refereed) Published
Abstract [en]

Structural-acoustic finite element models including three-dimensional (3D) modeling of porous media are generally computationally costly. While being the most commonly used predictive tool in the context of noise reduction applications, efficient solution strategies are required. In this work, an original modal reduction technique, involving real-valued modes computed from a classical eigenvalue solver is proposed to reduce the size of the problem associated with the porous media. In the form presented in this contribution, the method is suited for homogeneous porous layers. It is validated on a 1D poro-acoustic academic problem and tested for its performance on a 3D application, using a subdomain decomposition strategy. The performance of the proposed method is estimated in terms of degrees of freedom downsizing, computational time enhancement, as well as matrix sparsity of the reduced system.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2012. Vol. 132, no 5, 3162-3179 p.
Keyword [en]
3-Dimensional Poroelastic Materials, Displacement Formulation, Dynamic-Analysis, Frequency Range, Elastic Waves, Craig-Bampton, Interface, Convergence, Propagation, Performance
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-107082DOI: 10.1121/1.4750496ISI: 000310988200037Scopus ID: 2-s2.0-84869145262OAI: oai:DiVA.org:kth-107082DiVA: diva2:575343
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note

QC 20121210. QC 20160212

Available from: 2012-12-10 Created: 2012-12-06 Last updated: 2017-12-07Bibliographically approved

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Rumpler, RomainGöransson, Peter

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