粒子充てん構造物の振動減衰特性(第2報) : 減衰能発生に関する考察

概要

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This paper deals with experimental investigation on the generation of damping capacity of structures packed with balls. The relation between the vibration damping capacity and the noise damping capacity of the structures is examined. In the structures closely packed with balls, a linear relationship is not recognized within the vibration damping capacity and the noise damping capacity. The excitation packing is necessary for the close packing. However, this process is troublesome. Also, in the optimum packing ratio where the maximum damping capacity is obtained, the excitation packing is also inevitable. On the contrary, at 50% packing ratio, this excitation packing process is not necessary, and a linear relationship is seen between the vibration damping capacity and the noise. Therefore, the effect of magnitude of impulse, specific gravity, fiction coefficient and repulsion coefficient of packed balls on the damping capacity is investigated at 50% packing ratio. Moreover, the generation mechanism of damping capacity is discussed by observing the behavior of balls in the cavity during vibration.
公益社団法人精密工学会の論文
2003-05-05