基于改进等效平面法的结构系统可靠性分析

ADVANCED EQUIVALENT PLANE METHOD FOR STRUCTURAL SYSTEM RELIABILITY

将复相关理论引入到结构系统可靠性分析中,推导了并联体系等效功能函数的递推公式,提出了复相关等效平面法.解决了等效平面法等效原则中不包含相关性信息的问题,克服了等效平面法计算并联体系误差大的缺点.通过算例证明该方法有较高的计算精度,优于传统结构系统可靠性分析方法,适合大型结构系统的可靠性分析.

The theory of multiple correlations was adopted in structural system reliability analysis for the first time and the recursive formula of equivalent function for parallel system was deduced, and multiple correlation- equivalent plane method was presented. The method solves the problem that equivalent principles of equivalent plane method don＇t include the correlation information, and overcomes the lack of great error of equivalent plane method used in parallel system reliability. The result proves that the method has high accuracy and is better to traditional structure system analysis method, and is suitable for large structural system reliability analysis.