中文摘要：

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.

英文摘要：

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.