摘要
针对结构系统疲劳可靠性分析中失效途径极限状态函数的非线性性质，提出用二阶可靠性方法（ＳＯＲＭ）计算疲劳失效途径的失效概率．文中介绍了疲劳失效途径的可靠性模型及结构系统二阶可靠性方法的基本原理，并通过例题说明了计算过程．计算结果表明，采用二阶可靠性方法可使失效概率的计算精度得到显著的改善．
To cope with the nonlinearity of the limit state function of the failure path in fatigue reliability analysis of structural systems, a second order reliability method (SORM) is proposed for evaluating the fatigue failure probability of the failure path. A reliability model of the fatigue failure path is described, and fundamental principles of the SORM for structural systems are presented. The calculation procedure is illustrated by a numerical example. The results show that the accuracy of failure probability can be notably improved by using the second order reliability method.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1998年第11期13-16,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金
关键词
结构系统
可靠性
失效概率
疲劳失效
structural system
fatigue reliability
second order reliability method
