適応方向シミュレーションに基づく構造システムの信頼性評価法

概要

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This study outlines a structural failure probability estimation method based on an improved directional simulation, where directional vector samples are generated adaptively with a situation of the failure domain of the structural systems. The conditional failure probability on a certain sample direction is formulated as a piecewise integration with respect to the radial variable. To improve the sampling efficiency, the dominant failure modes effective for structural failure probability are selected and the directional samples are generated from the sampling density uniformly distributed over the surface of the unit hypersphere centered at the mean value point of the failure domain, which is composed of the selected dominant failure modes. The dominant failure modes and the mean value point are estimated through a preliminary simulation. Numerical examples are presented to illustrate that the computational efficiency of the structural failure probability estimation based on the proposed method is improved.
一般社団法人日本機械学会の論文
2004-06-25