648 閉空間領域内に吸音体を有する三次元音場の減衰特性の有限要素解析(遮音・吸音・減衰評価)(OS.10 : ダンピング)

概要

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This paper deals with analysis for acoustic properties of three-dimensional closed sound fields having sound absorption materials. In this analysis, the sound absorbers can have arbitrary shapes and can be located anywhere in the fields. The fields involve gas and sound absorbers which are modeled using finite element. A new three-dimensional element are developed for the absorbers. This element has two damping parameters which are complex density and complex volume elasticity. A new expression is also derived to get distribution of contribution to modal damping for each element. These approachs are applied to three-dimensional rooms. The results are compared with the privious experiments carried out by Utsuno and are discussed.
一般社団法人日本機械学会の論文
2001-08-03