荷重組合せを考慮した重要構造物の動的信頼性評価法の開発 : 第2報, 強度制限タイプに対する定式化

概要

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A method to estimate the dynamic reliability of structures under combined time varying loads is investigated. The response statistical moments of multi-degrees-of-freedom structures are obtained by modal synthesis technique and stationary random vibration theory. The formulation is demonstrated for three dynamic load cases which are; (a) both with nonzero mean, (b) both without nonzero mean and (c) with/without nonzero mean. Furthermore, first passage probability considering stochastic load combinations is derived by the load coincidence method under the assumption of a Poisson process for threshold crossings. The uncertainties of power spectral densities pertinent to loads as stochastic processes, are also considered through the derivation of first passage probability. This paper, as a 2nd report, describes the formulation of dynamic reliability against the limit states defined by structural integrity.
一般社団法人日本機械学会の論文
1990-07-25