结构系统可靠性理论与模拟算法

本文系统阐述了非线性结构系统可靠性理论的主体框架和模拟算法，重点分析了全局分枝－约界法、快速概率积分法、响应面法、随机有限元法和Ｍｏｎｔｅ Ｃａｒｌｏ模拟法的主要优缺点及其对强非线性问题和存在失效演化历程的复杂结构系统可靠性分析和评估问题的适应能力。在此基础上，本文对当前研究工作中存在的一些共同性问题进行了剖析，对将智能化方法引入非线性结构系统可靠性工程领域的方式和可行性进行了探讨。

A Reliability Theory and Simulation Algorithm of Nonlinear Structural System

The principal frame and simulation algorithms of nonlinear structural system reliability theory is systematica1ly introduced, and a brief analysis is make on the advantages and disadvantages of some popular system reliability analysis methods, such as fast probability integration method, stochastic finite element method, Monte Car1o simu1ation method and et al. A investigation is made on which method is more suitable to strong nonlinear systems.On the basis of above works, some common questions existing in the nonlinear structural system reliability theory and applications are analyzed, and a discussion on the way of introducing Bayes ian decision, artificta1 neural networks and wavelets analysis to the field of nonlinear structural system reliability analysis is made.