摘要
给出了在相关空间中改进 JC方法计算结构可靠指标的迭代格式 ,并采用有理多项式技术计算功能函数的偏导数 ,以模拟实际工程中常见的功能函数不能明确的可靠度计算问题。因此 ,功能函数无论是线性或非线性 ,显式或隐式 ,该方法都简单且适用。
In this paper, an iteration procedure for calculation of structural reliability index in the basic variables correlation space is proposed, and the rational polynomial technique is adopted to calculate the derivatives of the performance function at the design test point, which can simulate the reliability problems with the closed formed performance function in actual engineering. So, no matter the performance function is linear or nonlinear, explicit or inexplicit, this method is simple and suitable. Three illustrative examples are presented in this paper: first for linear and explicit performance function, second for nonlinear and explicit performance function, the third example for implicit performance function. The results for reliability index are compared with the other methods and show that this method has good efficiency and accuracy.
出处
《计算力学学报》
CAS
CSCD
北大核心
2001年第4期488-491,共4页
Chinese Journal of Computational Mechanics
关键词
结构可靠度
改进JC法
有理多项式技术
隐式功能函数
迭代
工程结构
structural reliability
reliability improved FOSM method
rational polynomial technique
implicit performance function