论文部分内容阅读
根据各失效模式验算点分布特性的不同,对体系失效边界的特性进行了补充分析。得到了多失效模式下边界不光滑程度较高的原因。另外分析了Gauss-Hermite积分方法求解体系失效概率的适用性问题。然后基于这些特性,提出了一种结合降维分解和梯形积分技术来计算体系失效概率的改进方法。实例分析表明该方法具有较高的精度和效率。
According to the different distribution of checking points of failure modes, the characteristics of the failure boundary of the system are further analyzed. The reason why the border is not smoother under multi-failure mode is obtained. In addition, the applicability of Gauss-Hermite integral method to solve system failure probability is analyzed. Then, based on these characteristics, an improved method combining the dimensionality reduction and trapezoidal integration to calculate the probability of system failure is proposed. The case study shows that this method has high accuracy and efficiency.