Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33652
Title: Energy transmission in a mechanically-linked double-wall structure coupled to an acoustic enclosure
Authors: Cheng, L 
Li, YY
Gao, JX
Issue Date: 2005
Source: Journal of the Acoustical Society of America, 2005, v. 117, no. 5, p. 2742-2751
Abstract: The energy transmission in a mechanically linked double-wall structure into an acoustic enclosure is studied in this paper. Based on a fully coupled vibro-acoustic formulation, focus is put on investigating the effect of the air gap and mechanical links between the two panels on the energy transmission and noise insulation properties of such structures. An approximate formula reflecting the gap effect on the lower-order coupled frequencies of the system is proposed. A criterion, based on the ratio between the aerostatic stiffness of the gap cavity and the stiffness of the link, is proposed to predict the dominant transmitting path, with a view to provide guidelines for the design of appropriate control strategies. Numerical results reveal the existence of three distinct zones, within which energy transmission takes place following different mechanisms and transmitting paths. Corresponding effects on noise insulation properties of the double-wall structure are also investigated.
Publisher: Acoustical Society of America
Journal: Journal of the Acoustical Society of America 
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.1886525
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