【摘要】 为解决用确定性有限元或已有无量纲断裂参数表值时进行弹塑性断裂随机分析的问题，本文研究了利用数值插值方法进行随机参数计算的可行性。以单边裂纹板为例，根据确定性有限元计算的无量纲断裂参数表值，通过多维插值计算获得断裂参数及其对基本随机变量变化率，应用“弹塑性断裂随机分析的工程方法”进行弹塑性断裂随机分析。算例表明在敏感区用插值方法计算的结果小于用随机有限元方法计算的结果。更多还原

【Abstract】 In probabilistic fracture analysis, it is necessary to evaluate the mean values and variances of fracture parameters. The mean values are usually computed by normal finite element method while the variances are often obtained using stochastic finite element method. In this paper, an interpolation method for stochastic analysis of engineering elastic-plastic fracture is introduced. In the present method, the mean values and the variances of fracture parameters are computed with reference to a table, which has been set up in advance. It is shown that the computed results by the interpolation method are smaller than those by stochastic finite element method in sensitive zone.更多还原