631 水平・上下にがたを含む非線形振動系の動特性について

概要

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This paper deals with simulation analysis of nonlinear vibration system with gaps in horizontal and vertical directions under random waves in two directions. The collision forces to an impact plate and the equivalent damping ratios are calculated by simulations. The results of the linear analysis are compared with those of the nonlinear analysis. The displacement of the nonlinear response are less than those of the linear response. Since the frequency distribution of displacement is mostly concentrated near a center, we think that approximation of a nonlinear spring is applicable. The collision forces are over yield loads. The plates have small plastic deformation. The system which has the plates with gaps has large equivalent damping ratios. We think that the plate with gaps reduced the response displacements.
社団法人日本機械学会の論文
2002-09-13