441 境界要素法を用いた構造物の音響放射解析に関する基礎的研究(音響利用,OS-13 モード解析とその応用関連技術)

概要

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Sound power radiated from vibration structure has become problem for life environment. The structural design for sound reduction is becoming important increasingly. Many researchers had reported about the optimum design for reduction of sound radiation by using finite element method and boundary element method. On the other hand, to reduce the radiation noise, it is also important to understand basic mechanism of sound radiation. Latest 20 years, the relationship between vibration modes and sound radiation efficiencies (radiation power matrix) has been examined by analytical approach. The purpose of this study is to clarify the effectiveness of BEM for prediction of the sound radiation and indicate the relationship between the characteristics of sound radiation and vibration modes by using the coefficient of radiation efficiency of each mode in frequency domain. This is the first step for the estimation of radiation power matrix of structure through numerical (FEM/BEM) and experimental approach.
一般社団法人日本機械学会の論文
2004-09-27