结构系统静强度可靠性分析理论与算法

提出了适用于大中型结构自动化可靠性分析的全局临界强度分枝-约界准则和相应的算法,证明了所提算法在一级和多级搜索纵深的条件下可严格确保不遗漏主要失效模式。采用全局分枝-约界法,对系统可靠性分析中一些重要问题进行了较为系统的分析研究,提出了伪失效模式和虚拟极限状态等新的理论概念。

Theory and Algorithm of Structural System Reliability under Static Loading

In this paper, the global branch-and-bound criterion and algorithm on system critical strength is suggested for automatic reliability analysis of a large scale structural system. In the case of one-order and multi-order searching depth. the event of losing any significant failure modes is impossible about this method, which is proofed in this paper. Using the global branch-and-bound method, some important questions on system reliability analysis is discussed, and some new theoritical concepts such as false failure mode and virtual limit state is provided for the first time.