A FINITE-ELEMENT MODEL FOR SOUND-TRANSMISSION THROUGH FOAM-LINED DOUBLE-PANEL STRUCTURES

Authors
Citation
Yj. Kang et Js. Bolton, A FINITE-ELEMENT MODEL FOR SOUND-TRANSMISSION THROUGH FOAM-LINED DOUBLE-PANEL STRUCTURES, The Journal of the Acoustical Society of America, 99(5), 1996, pp. 2755-2765
Citations number
20
Categorie Soggetti
Acoustics
ISSN journal
00014966
Volume
99
Issue
5
Year of publication
1996
Pages
2755 - 2765
Database
ISI
SICI code
0001-4966(1996)99:5<2755:AFMFST>2.0.ZU;2-B
Abstract
In this paper, methods for coupling both elastic porous material (i.e. , foam) and structural finite elements with either modal or finite ele ment representations of acoustical system are presented. In addition, interface conditions are described for coupling elastic porous materia l finite elements with acoustical and structural finite elements in va rious configurations. The foam finite element is based on the elastic porous material theory of Biot. By considering sound transmission thro ugh layered systems placed in a waveguide, the accuracy of the coupled acoustical-structural-foam finite element model has been verified by comparing its transmission loss predictions with analytical solutions for the matching cases of infinite lateral extent. The constraint cond itions at the edges of both the foam lining and the facing panels were found to have a significant effect on the normal incidence sound tran smission loss of the double panel system at low frequencies. (C) 1996 Acoustical Society of America.