立て形構造物の水平・上下二次元地震動に対する振動応答解析 : 第2報,非定常不規則波応答

概要

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This paper clarifies vibration response characteristics of a vertical mechanical structure subjected to horizontal and vertical nonstationary random excitation. The structure is modeled as a cantilever beam with a lump mass at its free end ; taking into account the first vibration mode for numerical computation of vibration response, response multiplication factor maps with respect to dominant frequencies, w_H and w_v, of both horizontal and vertical extitations are obtained for the structure's damping, ,magnitude and randomness of vertical excitation. A very high response appears at w_v=2 and w_H=1 and its magnitude varies with a slight change in the power spectral density contained in nonstationary vertical excitation waves at w_v=2. For w_H=1, the conditions of unstable parametric random vibration are obtained for structure damping and magnitude of vertical excitations.
一般社団法人日本機械学会の論文
1987-02-25