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Microstructure-based numerical modelling of foams for acoustic shielding
Eindhoven University of Technology, Mechanics of Materials, Department of Mechanical Engineering, The Netherlands. (TU Eindhoven)
Eindhoven University of Technology, Department of Mechanical Engineering, The Netherlands. (TU Eindhoven)
Eindhoven University of Technology, Department of Mechanical Engineering, The Netherlands. (TU Eindhoven)
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Numerical acoustics.ORCID iD: 0000-0003-1855-5437
2014 (English)In: 21st International Congress on Sound and Vibration 2014, ICSV 2014, International Institute of Acoustics and Vibrations , 2014, 881-887 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, a numerical homogenization approach is proposed to obtain isotropic Biot's parameters based on the microstructure of an porous material. It is assumed that a macroscopic point can be represented by a microscopic Representative Volume Element (RVE) consisting of the solid and the fluid. The macroscopic properties are controlled by Biot's equations and the RVE is governed by linearized balance equations for momentum and linear constitutive laws. With suitable boundary conditions, the micro-macro relation is formulated based on consistency of energy. Then, Biot's parameters are calculated through the response of the RVE. By following this new homogenization approach, examples with simple microstructures are given and simulations of two sound absorption experiments are conducted by using Biot's equations. The results are compared with Direct Numerical Simulations and it shows a favourable performance of this new approach compared to the alternative Transfer Matrix Method.

Place, publisher, year, edition, pages
International Institute of Acoustics and Vibrations , 2014. 881-887 p.
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-164934Scopus ID: 2-s2.0-84922636260ISBN: 9781634392389 (print)OAI: oai:DiVA.org:kth-164934DiVA: diva2:806518
Conference
21st International Congress on Sound and Vibration 2014, ICSV 2014; Beijing; China; 13 July 2014 through 17 July 2014
Note

QC 20150422

Available from: 2015-04-20 Created: 2015-04-20 Last updated: 2016-09-01Bibliographically approved

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Göransson, Peter

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CiteExportLink to record
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  • apa
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Output format
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