一种结构可靠性指标的搜索方法  

A search algorithm for structural reliability index

作　　者：吴狄[1] 关鼎[2] 

机构地区：[1]沈阳工程学院机械工程系,辽宁沈阳110136 [2]沈阳工业大学,辽宁沈阳110023

出　　处：《计算力学学报》2005年第6期788-791,共4页Chinese Journal of Computational Mechanics

摘　　要：提出了一种计算结构可靠性指标的搜索方法,即自动变步长搜索方法。该方法克服一次二阶矩方法的缺点,对于非线性功能函数非常有效。数值例题表明:这种方法具有很好的收敛性和较高的计算精度,且其收敛性与初始步长无关,可以用于复杂问题可靠度的分析。This paper presented a search algorithm proposed for calculating index, which changes step automatically. The algorithm overcomes the fault the structural reliability existing in the first-order second-moment method. That is to say, even when the nonlinearity of performance comparatively high, the convergence can still be guaranteed. So the algorithm can automatically, so that it overcoumes some faults existing in other algorithms. For in is decided by the selection of step can only depend on experimental calculation. The numerical results demonstrate that the algorithm has characteristics of bet relatively high accuracy, and it can be used in analysis on reliability of complex pro stance, function is change step convergence ter convergence and blems.

关 键 词：结构 可靠性指标 搜索方法 自动变步长搜索方法 

分 类 号：O213.2[理学—概率论与数理统计] TU311.2[理学—数学]