具有不确定材料参数重力坝概率分析逆问题的一种新解法

A NEW METHOD FOR SOLVING INVERSE PROBLEM OF STATISTICS OF GRAVITY DAMS WITH STOCHASTIC MATERIAL PARAMETERS

本文提出了一种求解不确定材料参数结构概率分析逆问题的方法.该方法利用了灵敏度分析、随机摄动法和广义逆矩阵的理论,利用原位观测资料,推求影响结构运行的材料参数的统计特性.以某重力坝为例证明了本方法的有效性和实用性.

A new method, which is used to solve the inverse problem of statistics of structures with'stochastic material parameters, is presented using sensitivity analysis, random perturbation method and generalized inverse matrix theory. It uses in situ observed data of several observation points to derive the statistics of matetial parameters which affect the operation of structures.Numerical examples about a gravity dam are given to illustrate the practice and validity of the method.