Comments on the limp frame equivalent fluid model for porous media
Comments on the limp frame equivalent fluid model for porous media
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DOI：
10.1121/1.2800895
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发表时间：
2007-12-01
影响因子：
2.4
通讯作者：
Panneton, Raymond
中科院分区：
文献类型：
--
作者：
Panneton, Raymond
在这封信中，有效密度的低和高频率范围内的软框架多孔介质的特点进行了研究。这些理论极限相比，发现一个经典的刚性框架多孔介质，和实验测量。虽然柔软和刚性的有效密度的高频渐近行为通常只有轻微的不同，它们的低频行为是显着不同的。与在柔软框架纤维层上进行的实验测量相比，只有柔软框架有效密度在整个频率范围内产生良好的相关性。(c)2007年美国声学学会
In this letter, the low and high frequency limits of the effective density characterizing a limp frame porous medium are investigated. These theoretical limits are compared to the ones found for a classical rigid frame porous,medium, and to experimental measurements. While the high frequency asymptotic behaviors of both limp and rigid effective densities are usually only slightly different, their low frequency behaviors are significantly different. Compared to experimental measurements performed on a limp frame fibrous layer, only the limp frame effective density yields good correlations over the whole frequency range. (c) 2007 Acoustical Society of America