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局部腐蚀油气管道失效压力计算方法
崔铭伟,曹学文,封子艳,张俊,马玉鹏
0
(中国石油大学储运与建筑工程学院,山东青岛 266580;陕西延长石油集团有限责任公司研究院, 陕西西安 710075)
摘要:
利用管道应力集中理论,以数值模拟数据为基础,建立一种局部腐蚀油气管道失效压力的计算方法。验证非线性有限元法评价局部腐蚀的可靠性,用该方法分析局部腐蚀半径及局部腐蚀深度对管道失效压力的影响;并与其他评价规范计算结果进行对比。结果表明,拟合得到的局部腐蚀油气管道失效压力计算方法的误差小,误差分布均匀,可以满足局部腐蚀油气管道失效压力的预测要求。
关键词:  油气管道  局部腐蚀  局部腐蚀尺寸  非线性有限元法  应力集中  计算方法
DOI:10.3969/j.issn.1673-5005.2013.06.020
投稿时间:2013-03-06
基金项目:国家自然科学基金项目(51006123)
Calculation method of oil-gas pipeline failure pressure with localized corrosion
CUI Ming-wei,CAO Xue-wen,FENG Zi-yan,ZHANG Jun,MA Yu-peng
(College of Pipeline and Civil Engineering in China University of Petroleum, Qingdao 266580, China;Research Institute of Shaanxi Yanchang Petroleum Group Company Limited, Xi 'an 710075, China)
Abstract:
A method to calculate failure pressure of oil-gas pipeline with localized corrosion defects was established based on stress concentration theory and the numerical simulation data. This method was used to assess the impacts of radius of localized corrosion and localized corrosion depth on oil-gas pipeline failure pressure. The reliability of evaluating the localized corrosion with the non-linear finite element method was also validated. Compared with existing calculation methods, the calculation method introduced has both small error and evenly distributed error in calculating oil-gas pipeline failure pressure, therefore, it meets the requirements of predicting oil-gas pipeline failure pressure with localized corrosion defect.
Key words:  oil-gas pipeline  localized corrosion  localized corrosion size  nonlinear finite element method  stress concentration  calculation method
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