入力の多次元相関を考慮した多自由度系の確率論的解析(<特集>D & D 2007)

概要

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The regulatory guide for seismic design of nuclear power plant has been vastly revised at several fields. Main items under revision are observed such as the requirement of making appropriate concern for the dynamic coupling effects of horizontal and vertical components of earthquake, and the consideration of probabilistic risk assessment against the uncertainty of earthquake. The purpose of this paper, therefore, is to estimate the stochastic responses of multi-degree-of-freedom structure with closely spaced natural frequencies under the consideration of the correlations between multi components of earthquake. For this target, one mathematical model is developed in order to analytically evaluate the effects of correlation between components of input, and the stochastic vibration analysis is executed based on FEM-based eigen mode analysis and transition matrix method. The analytical results are compared with those by Monte Carlo simulation. Failure probability of structure is also explained as a typical example applying the proposed technique to the probabilistic seismic design.
一般社団法人日本機械学会の論文
2008-05-25