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Please use this identifier to cite or link to this item: http://hdl.handle.net/10087/2783

Title: 固体-多孔体-空気からなる防音構造の減衰特性のFEM解析
Other Titles: Finite Element Analysis for Damping Properties of Sound-Proof Structures Having Solid Body, Porous Media and Air
Authors: 山口, 誉夫
黒沢, 良夫
松村, 修二
Keywords: Damping
Damping Material
Sound-Proof Structure
Computer Aided Analysis
Porous Media
Issue Date: 25-Jan-2003
Publisher: 日本機械学会
Citation: 日本機械学會論文集 C編. 69(677), 34-41 (2003)
Abstract: A numerical method is proposed to calculate damping properties for sound-proof structures involving solid body, porous media and air in two dimensional regions. Both effective density and bulk modulus have complex quantities to represent damped sound fields in the porous media. Particle displacements in the media are discretised using finite element method. For solid body, displacements are modeled using conventional finite elements including complex modulus of elasticity. Displacement vectors at common unknown varriables, are solved under coupled condition between solid body, porous media and air. Further, explicit expressions of modal loss factor for the mixed structures are derived using asymptotic method. The proposed methods yield appropriate results for some sample problems. Moreover, it is found that damping can be coupled in the mixed structures.
URI: http://hdl.handle.net/10087/2783
ISSN: 0387-5024
Appears in Collections:学術雑誌論文

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