【摘要】 介绍了有关计算含缺陷结构可靠性的一种方法———一次二阶矩可靠性方法 ,并给出了一个含腐蚀缺陷油气管线结构可靠性计算的实例。计算结果表明 ,一次二阶矩可靠性方法与常规Monte Carlo方法相比 ,只须迭代 6次就可求得所需的可靠度 β ,计算效率很高 ,计算结果可精确到 0 0 0 0 1。此外 ,根据结构的动态失效模型还可以确定油气管线结构在不同时期的可靠度以及结构的有效剩余寿命更多还原

【Abstract】 The first order and second moment reliability method for estimating reliability of the mechanical structures with some defects was concisely reviewed.This method defines that the structural reliability index is the shortest distance from the origin to the failure surface in a standard normal coordinate system.An example about reliability estimation of oil and gas pipelines with corrosion defects was given.The results show that the reliability index can be achieved by this method only being iterated for six times.Compared with the Monte?Carlo simulation method,it has a high efficiency and the accuracy of 0 01%.Furthermore,the reliability at different periods and the effective remaining life of oil and gas pipelines could also be determined with the dynamic failure model of structure.更多还原