随机因素影响下二力杆结构的蠕变损伤问题

Study on Two-Bar Structural Creep Damage Model with Random Parameters

根据蠕变损伤理论和可靠性理论,考虑到蠕变损伤参数的随机性质,建立了在随机因素影响下的蠕变损伤概率失效模型.运用蒙特卡洛抽样法计算出相关构件的蠕变损伤图、应力图和概率损伤图.计算结果表明,不同性质结构随着时间、材料损伤和应力的变化情况,并对蒙特卡罗抽样算法进一步讨论,提出了简便的计算方法.

Based on the creep damage theory and reliability theory, and considering the random characteristics of the creep damage parameters, a creep damage probabilistic model was presented. Firstly, the pictures of the creep damage, stress and probabilistie damage were computed by using Monte Carlo simulation. The results show the damage and stress in the different parts changing with times. Finally, the further discussion on the Monte Carlo sampling methods was done, some simple sampling methods were presented.