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A finite element solution strategy based on Padé approximants for fast multiple frequency sweeps of multivariate problems
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Numerical acoustics. (Materials- and Structural-Acoustic group)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
2013 (English)In: Proceedings of Meetings on Acoustics: Volume 19, 2013, Acoustical Society of America (ASA), 2013, 065003- p.Conference paper (Refereed)
Abstract [en]

Analyses involving structural-acoustic finite element models including three-dimensional modelling of porous media are, in general, computationally costly. While being the most commonly used predictive tool in the context of noise and vibrations reduction, efficient solution strategies enabling the handling of large-size multiphysics industrial problems are still lacking, particularly in the context where multiple frequency response estimations are required, e.g. for topology optimization, multiple load cases analysis, etc. In this work, an original solution strategy is presented for the solution of multi-frequency structural-acoustic problems including poroelastic damping. Based on the use of Padé approximants, very accurate interpolations of multiple frequency sweeps are performed, allowing for substantial improvements in terms of computational ressources, i.e. time and memory allocation. The method is validated and will be demonstrated for its potential on 3D applications involving coupled elastic, poroelastic and internal acoustic domains.

Place, publisher, year, edition, pages
Acoustical Society of America (ASA), 2013. 065003- p.
, Proceedings of Meetings on Acoustics, ISSN 1939-800X ; 19
Keyword [en]
Finite element models, Finite element solution, Industrial problem, Multiple frequency, Multiple load case, Noise and vibration, Structural-acoustic problems, Three-dimensional modelling
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-133589DOI: 10.1121/1.4799565ScopusID: 2-s2.0-84878957490OAI: diva2:662343
21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America; Montreal, QC; Canada; 2 June 2013 through 7 June 2013

QC 20131121

Available from: 2013-11-06 Created: 2013-11-06 Last updated: 2013-11-21Bibliographically approved

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