不確かさを持つ薄肉圧力容器の確率有限要素法解析

概要

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The effect of geometrical uncertainty and thickness variability on the stress distribution of a thin-walled pressure vessel is analysed by the stochastic finite-element method based on the second-order perturbation technique. Numerical analyses are carried out in regard to an axisymmetric model and 3-D shell model with the circular dent due to the welding joint under internal pressure. Moreover, as an attempt to estimate the reliability of a thin-walled pressure vessel, the stochastic safety factor is evaluated with respect to the calculated stress by using the stochastic finite-element method, and it is compared with the conventional safety factor divided minimum strength of material by calculated maximum stress.
社団法人日本機械学会の論文
1990-06-25