大規模構造-音場連成問題のための部分構造合成法の開発

概要

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In order to analyze frequency response problems in the higher frequency range, we have developed a component mode synthesis method, based on the mode superposition technique, which is capable of simulating a higher frequency range using fewer modal degrees of freedom. In this paper, it is expanded to the solution of a coupled structure-acoustic fluid interaction problem, and it is applied to the interior noise problems of the vehicle cabin. In the cases of analysis of higher frequency range, the required mesh size in the FEM models of the vehicle body becomes much finer than that in the acoustic model, in order to obtain sufficient accuracy. A technique based on the least square method is presented to connect the fine structural mesh with a coarse acoustic one on the interface having noncoincident nodal points of the structure and acoustic field. Several numerical examples are analyzed to verify the effectiveness of the present method.
一般社団法人日本機械学会の論文
1995-07-25