石油学报 ›› 2003, Vol. 24 ›› Issue (1): 96-99.DOI: 10.7623/syxb200301020

• 石油工程 • 上一篇    下一篇

含缺陷油气管线结构的可靠性计算

董玉华1, 高惠临2, 周敬恩1, 冯耀荣3, 霍春勇3   

  1. 1. 西安交通大学材料学院, 陕西西安, 710049;
    2. 西安石油学院, 陕西西安, 710065;
    3. 中国石油天然气集团公司石油管材研究所, 陕西西安, 710065
  • 收稿日期:2001-08-28 修回日期:2001-11-29 出版日期:2003-01-25 发布日期:2010-05-21
  • 作者简介:董玉华,女,1973年1月生,1999年毕业于西安石油学院机械电子工程专业,现为西安交通大学在读博士.
  • 基金资助:
    中国石油天然气集团公司中青年创新基金项目(2001CX37).

Reliability estimation of oil and gas pipelines with some defects

DONG Yu-hua1, GAO Hui-lin2, ZHOU Jing-en1, FENG Yao-rong3, HUO Chun-yong3   

  1. 1. Material Science and Engineering Institute of Xi'an Jiaotong Uneversity, Xi'an 710049, China;
    2. Xi'an Petroleum Institute, Xi'an 710065, China;
    3. Tubular Goods Research Center, CNPC, Xi'an 710065, China
  • Received:2001-08-28 Revised:2001-11-29 Online:2003-01-25 Published:2010-05-21

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0.0001.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.

关键词: 缺陷, 可靠度, 一次二阶矩方法, 随机变量, 动态模型

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.

Key words: oil and gas pipeline, defect, reliability, first order and second moment reliability method, stochastic variables, dynamic model

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