不确定分析技术中的多项式正态转换方法研究

不确定性及可靠性分析技术已广泛应用于水利及土木系统工程分析中，可靠性计算的核心之一是对随机变量进行正态转换。对土木工程系统不确定性及可靠性分析中有着潜在应用前景的非正态随机变量的多项式正态转换方法进行了研究，通过在各种条件下非正态随机变量的正态多项式转换成果之评价，发现在水利及土木工程可靠性分析中常用的许多分布可以保留其自身的比较好的特征。

Study on the Polynomial Transforms in Uncertainty Analysis

Technology of uncertainty and reliability analysis has been widely used in the systems of water resources and civil engineering. One of the core computations is normal transformation of random multi-variables. In the most of case,the technology of transformation is based on the normal multivariate. This paper presents an investigation about the potential usefulness of polynomial normal transforms technique for uncertainty and reliability analysis of civil engineering systems. Results from the performance evaluation of the polynomial transform under various conditions have indicated its good capability in preserving the characteristics of many distributions commonly used in engineering reliability analysis.