针对大面积片状腐蚀缺陷导致管道破坏的问题，利用ABAQUS软件并结合实际数据，建立不同腐蚀条件下的腐蚀管道模型，采用正交试验法对其应力状态进行分析，将模拟结果与API579准则结果进行比较，验证其准确性。结果表明：腐蚀长度、宽度、深度均对带大面积腐蚀缺陷管道的应力状态产生影响，其中腐蚀深度的影响最为显著，腐蚀长度的影响最小；腐蚀宽度在40°～80°范围内对管线的应力状态影响较大，当腐蚀宽度超过80°时，应力变化趋于稳定；不同腐蚀尺寸参数对管线的应力状态影响程度不同，其中腐蚀深度影响最大，所以在进行管线补强、剩余寿命预估及安全评估时，要重点考虑腐蚀深度的影响。
Aiming at the problem of pipeline damage caused by large - area flaky corrosion defects, ABAQUS software and actual data were used to establish corroded pipeline models under different corrosion conditions, and the orthogonal test method was used to analyze the stress state. The simulation results were compared with the API579 standard results to verify the accuracy. Results showed that the corrosion length, width and depth all had effects on the stress state of pipelines with large - area corrosion defects, of which the corrosion depth had the most significant influence and the corrosion length had the least influence; the corrosion width also had a greater influence on the pipeline stress state within a certain range of 40°～80°. When the corrosion width was over 80°, the stress change tended to be stable. Besides, different corrosion size parameters had different effects on the stress state of the pipeline, among then the corrosion depth had the greatest influence. Consequently, the impact of corrosion depth must be focused on when carrying out pipeline reinforcement, remaining life estimation and safety assessment.
