蠕变损伤的概率计算及参数敏感性分析

The Probabilistic Calculation of Creep Damage and the Parameter Sensitivity Analysis

由于材料性质数据和损伤模型的分散性和不确定性 ,计算的损伤结果也产生不确定性 ,概率方法可以定量考虑不确定性的影响。本文根据确定性模型的研究工作 ,提出了新的蠕变损伤概率计算模型 ,并对影响高温构件蠕变损伤各参数进行了参数敏感性分析。

WT5BZ]Due to the scatter and uncertainty of material property data and damage development model, the result of creep was uncertainty. The influence of uncertainty can be quantitatively analyzed by probabilistic method . A new probabilistic creep damage model was proposed in this paper based on the deterministic model. And the sensitivity of the parameters was analyzed in detail. The probabilistic creep damage model would provide the effective means to assess the reliability of the high temperature components.