粘弾性層をもつ三層く形棒のねじり制振特性 : 実験に基づくサンドイッチ棒および被覆棒の特性評価

概要

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Experimental evaluations of the torsional rigidities and loss factors of a sandwich rod with a viscoelastic core and of a covered rod having comosition opposite to that of the sandwich rod are carried out in order to verify the analytical results previously presented. The experimental results are discussed for the typical nonsymmetrical rods having the same total outer layer thickness and changing these outer layer thickness ratios, and also are discussed for the geometrically similar sandwich and covered rods. The damping characteristics of both rods present remarkably different features. These features are verified by the experimental and analytical results. Furthermore, the temperature at which the highest loss factor of the sandwich rod appears usually differs from the glass transition temperature of the viscoelastic core material. Such difference of the temperature results in less damping capacity of the rod. It was shown from a strain energy analysis and the experimental results that the adjustment of the core layer thickness enables such difference to be smaller if the shear modulus of the core material was a known value.
一般社団法人日本機械学会の論文
1991-03-25