Modeling vibroacoustic systems involving cascade open cavities and micro-perforated panels

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机构：
[1] Yu, Xiang
[2] Cheng, Li
[3] Guyader, Jean-Louis
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Cheng, L. (li.cheng@polyu.edu.hk) | 1600年 / Acoustical Society of America卷 / 136期
关键词：
While the structural-acoustic coupling between flexible structures and closed acoustic cavities has been extensively studied in the literature; the modeling of structures coupled through open cavities; especially connected in cascade; is still a challenging task for most of the existing methods. The possible presence of micro-perforated panels (MPPs) in such systems adds additional difficulties in terms of both modeling and physical understanding. In this study; a sub-structuring methodology based on the Patch Transfer Function (PTF) approach with a Compound Interface treatment technique; referred to as CI-PTF method; is proposed; for dealing with complex systems involving cascade open/closed acoustic cavities and MPPs. The co-existence of apertures and solid/flexible/micro-perforated panels over a mixed separation interface is characterized using a compound panel subsystem; which enhances the systematic coupling feature of the PTF framework. Using several typical configurations; the versatility and efficiency of the proposed method is illustrated. Numerical studies highlight the physical understanding on the behavior of MPP inside a complex vibroacoustic environment; thus providing guidance for the practical design of such systems. © 2014 Acoustical Society of America;
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