边界元逆分析法预测含未知缺陷的结构可靠性

PREDICTION OF THE STRUCTURAL RELIABILITY WITH UNKNOWN FLAW BY INVERSE ANALYSIS OF BOUNDARY ELEMENT METHOD

结构分析中常遇到结构体内含有未知缺陷等情况，用常规的可靠性计算方法无法对结构进行正确的可靠性分析。本文利用随机边界元法与非线性优化技术相结合，根据弹性体内或边界上的位移、应力等附加信息，建立了结构可靠性预测的边界元逆分析法的基本模型。

In the structural analysis,it is often existed that unknown flaw is in the structure,conventional structural analysis can’t obtain the structural reliability correctly.Based on the additional information such as displacements or stresses provided at several internal or boundary points in the structure,combined with stochastic boundary element method and optimization technique,the basic model of the prediction of the structural reliability by inverse analysis of boundary element method is presented in this paper.Numerical example is given to demonstrate the usefulness of the protested theory.