摘要
随着中国不断增长的天然气需求量和天然气管道建设的稳步推进,急需对高钢级管线钢的剩余强度进行评价,其中建立失效压力模型是剩余强度评价中最重要的组成部分。以X100钢级管道为研究对象,使用ABAQUS有限元软件对两种体积型腐蚀缺陷进行有限元建模,利用全尺寸爆破试验数据对模型进行准确性验证。基于35组X100钢级不同尺寸钢管和不同几何缺陷模型的仿真模拟值,采用1stOpt拟合软件构建出X100钢级输气管道的失效压力预测模型,并对构建的拟合计算公式进行误差分析,结合真实爆破试验验证了失效压力模型的准确性。研究结果可为完善现有高钢级输气管道剩余强度评价方法提供参考。
With the continuous increase of natural gas demand and the steady progress of gas pipeline construction in China,it is in urgent need to evaluate the remaining strength of high-grade pipeline steel. And the establishment of a failure pressure model is the most important part to evaluate the remaining strength. In this paper, X100 steel pipe was taken as the research object. ABAQUS finite element software was adopted to carry out finite element analysis on two kinds of volumetric corrosion defects, and the correctness of the model was verified by full-scale blasting test data. Then, based on 35 groups of simulation results of X100 steel pipes of different sizes with different geometric defects, the failure pressure prediction model for X100 high-grade pipeline was established by 1 stOpt fitting software. Finally, error analysis was conducted on the fitting formula, and the accuracy of the failure pressure model was verified by means of the real blasting test. The research results can provide references for improving the existing remaining strength evaluation methods of high-grade gas pipelines.
引文
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