摘要
对结构功能函数为相关非正态随机变量构成情况 ,使用PFSORM算法确定结构二次可靠指标时须使用随机变量的条件分布函数。而实践中条件分布函数常不易确定。基于此 ,本文对PFSORM算法作一改进 。
In the situation of structural performance function consisting of non normal dependent random variables,conditional probability distribution functions of the random variables are needed for calculating structural second order reliability index by using Point Fitting SORM.In engineering practice,it's sometimes difficult to get the conditional probability distribution functions.Thus,the Point Fitting SORM is improved in this paper to deal with the situation.In the improved Point Fitting SORM, only probability distribution functions and correlation coefficients of the random variables are needed for calculating structural second order reliability index.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
2001年第6期34-36,共3页
Journal of Sichuan University (Engineering Science Edition)
