構造音響連成解析によるボルト固定円板の透過音予測

概要

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In this paper, the calculation method is presented for estimating the transmission level through a bolted plate, utilizing a coupled acoustic structural analysis of Finite Element Method. And the calculation method is presented for estimating the transmission level by mass spring model which is equivalent with circular plate. In a flexible panel its own sound radiation, caused by the sound induced vibration, often increases its transmissibility significantly. Presented modeling technique incorporates the sound radiation and the conventional Transmission Loss for the better estimation of sound through a panel. Also the rotational stiffness of the bolts are included for the accurate finite element modeling of a flexible plate. As a numerical example, a circular plate with bolted edge is investigated, and the calculated transrnission level shows good agreement with the measured result.
社団法人日本機械学会の論文
1999-06-25