比例減衰の特性について

概要

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The purpose of this study is to obtain a clear understanding of the proportional damping coefficients which are widely used for modal analysis. It is suggested that the coefficient which is proportional to the mass matrix is due to the damping force excited by the resistance of the environmental medium. Also, another coefficient which is proportional to the stiffness matrix is related to the internal damping of the elastic medium. To examine the above hypothesis, three vibrating tests for a thin elastic plate are performed. The damping properties of a plane plate in air, a thin rubber-sheet-attached plate which will increase the internal damping, and a plate in water so as to raise the resistance of the surroundings have been discussed. The damping force by the water is calculated by sound radiation impedance, and compared with the experimental results. The result is that the presumption is confirmed.
一般社団法人日本機械学会の論文
1991-03-25