基于双判据失效准则的结构可靠度计算方法

Calculation Method of Structure Reliability Based on the Double Failure Criteria

根据结构可靠指标的几何意义,建立了基于R6双判据失效准则下正态随机变量和非正态随机变量的结构可靠度计算的优化模型,并利用基于最优化原理的MonteCarlo法对其求解,无需对非线性功能函数作线性化近似处理,也减少了迭代次数,在概率断裂失效判据上进行改进,从而提高了结构可靠度的计算精度,扩大了其适用范围,为结构可靠度分析提供了一种思路。

According to the geometric sense of the structure reliability indicator, normal random variables and non-normal random variables in the calculation of structural reliability optimization model is established based on the R6 double failure criteria. Using the Monte Carlo method based on the principle of optimization, study the problem. This method needs not to linear approximation treat to the nonlinear function, reduces the number of iteration, improves the probability of fracture failure criterion and expands its scope of application. It provides a new thinking way of the structure reliability analysis.