RELIABILITY ESTIMATION OF A NATURAL GAS PIPELINE WITH SURFACE CRACK

机译：带有表面裂纹的天然气管道的可靠性估算

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The reliability estimation of API 5L X65 natural gas pipeline with a semi-elliptical crack along a pipeline surface is performed by utilizing the probabilistic methods, such as the First Order Reliability Method (FORM) and the Second Order Reliability Method (SORM). The probabilistic method accounts for the uncertainties in the load and the resistance parameters on the Limit State Function (LSF). The LSF is formulated with the help of fracture control concept including the Stress Intensity Factor (SIF) for a natural gas pipeline with cracks or crack like defects. The hoop stress due to the internal pressure is considered to be a major load. The effects of probabilistic distribution characteristics of random variables, on the failure probability are systematically investigated. The probabilistic distribution characteristics of random variables include the normal, the log-normal and the Weibull distributions. The results obtained by using the FORM and the SORM are compared with those determined by the Monte Carlo Simulation (MCS).

机译：利用一阶可靠性方法（FORM）和二阶可靠性方法（SORM）等概率方法，对沿管道表面具有半椭圆形裂缝的API 5L X65天然气管道进行了可靠性评估。概率方法考虑了负载的不确定性以及极限状态函数（LSF）上的电阻参数。 LSF是在包括裂缝或类似裂纹缺陷的天然气管道的裂缝控制概念（包括应力强度因子（SIF））的帮助下制定的。由内部压力引起的环向应力被认为是主要的负荷。系统地研究了随机变量的概率分布特征对失效概率的影响。随机变量的概率分布特征包括正态分布，对数正态分布和威布尔分布。将通过使用FORM和SORM获得的结果与通过蒙特卡洛模拟（MCS）确定的结果进行比较。

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《ASME pressure vessels and piping conference;PVP2009》|2010年|P.459-466|共8页
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O. S. Lee; H. M. Kim; D. H. Kim; H. B. Choi;
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中图分类压力容器;
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RELIABILITY ESTIMATION OF A NATURAL GAS PIPELINE WITH SURFACE CRACK

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