减振橡胶结构的概率-区间混合动态可靠度分析

Reliability is an important indicator of structures' safety evaluation. For shock absorption rubber, a model of probability - interval mixed dynamic reliability is constructed, and a simplified reliability calculation method is presented. The method firstly derived the temperature field of a rubber cylinder under cyclic loading by taking the viscoelastic property of the material into account. Then a thermal failure criterion, taking into account the reduction of the heat resistance of the material, is used to describe the limit state equation, and the uncertainty parameters are given by a probability-interval mixed model. Finally, the dynamic limit state function is simplified into a time-independent one, and an efficient scheme of sequential iteration to solve the two-layer nesting optimization, and then the upper and lower bound of dynamic reliability for rubber structures is obtained.