Microstructure-based numerical modeling of foams for acoustic shielding

K. Gao, J.A.W. van Dommelen, M.G.D. Geers, P. Göransson

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)
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Samenvatting

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.

Originele taal-2Engels
Titel21st International Congress on Sound and Vibration 2014, ICSV 2014
UitgeverijInternational Institute of Acoustics and Vibrations
Pagina's881-887
Aantal pagina's7
Volume1
ISBN van geprinte versie978-1-6343-9238-9
StatusGepubliceerd - 2014
Evenement21st International Congress on Sound and Vibration (ICSV 21), July 13-17, 2014, Beijing, China - Beijing, China
Duur: 13 jul 201417 jul 2014
http://www.iiav.org/icsv21/

Congres

Congres21st International Congress on Sound and Vibration (ICSV 21), July 13-17, 2014, Beijing, China
Verkorte titelICSV 21
LandChina
StadBeijing
Periode13/07/1417/07/14
Internet adres

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Citeer dit

Gao, K., van Dommelen, J. A. W., Geers, M. G. D., & Göransson, P. (2014). Microstructure-based numerical modeling of foams for acoustic shielding. In 21st International Congress on Sound and Vibration 2014, ICSV 2014 (Vol. 1, blz. 881-887). International Institute of Acoustics and Vibrations.