逆断层作用下埋地管道屈曲响应分析及预测  

Buckling response analysis and prediction of buried pipelines under reverse faults

作　　者：邱开心 蔡志钦 肖望强 蔡思捷 林俊泽 陈少锋 QIU Kaixin;CAI Zhiqin;XIAO Wangqiang;CAI Sijie;LIN Junze;CHEN Shaofeng(School of Aerospace Engineering,Xiamen University,Xiamen Fujian 361000,China)

机构地区：[1]厦门大学航空航天学院,福建厦门361000

出　　处：《工业安全与环保》2024年第11期12-17,共6页Industrial Safety and Environmental Protection

基　　金：国家石油天然气管网集团有限公司技术开发项目(GWHT20230013782)。

摘　　要：地震断层引起的地面永久变形会导致埋地管道屈曲或整体失稳,威胁油气管道的安全。针对跨断层埋地管道屈曲响应的精准预测难题,以断层作用下管道轴向压应变快速增长前的应变作为判断管道局部屈曲的标准,提出了一种跨断层埋地管道屈曲响应仿真分析及预测方法。通过等效边界弹簧对管道端部的轴向补偿,建立了逆断层作用下埋地管道非线性有限元模型,探究了不同敏感参数下管道的应变响应,基于非线性回归得到了管道屈曲预测修正公式,结合实验对比验证了方法的准确性,为管道穿越逆断层的失效分析和安全设计提供了参考。Permanent ground deformation caused by earthquake faults leads to buckling or overall instability of buried pipelines,which threatens the safety of oil and gas pipelines.Aiming at the accurate prediction of the buckling response of buried pipelines across faults,a simulation analysis and prediction method of the buckling response of buried pipelines across faults was proposed by taking the strain of the pipeline before the rapid growth of the axial compressive strain under the action of the fault as the criterion for judging the local buckling of the pipeline.Through the axial compensation of the pipeline end by the equivalent boundary springs,a nonlinear finite element model of the buried pipeline under the action of the reverse fault was established,and the strain response of the pipeline under different sensitive parameters was investigated,and the correction formula of the pipeline buckling prediction was obtained based on the nonlinear regression,and the accuracy of the method was verified by combining with experimental comparisons,which provided a reference for the failure analysis and safety design of the pipeline crossing the reverse fault.

关 键 词：逆断层 非线性有限元 管道屈曲 临界应变 预测 

分 类 号：TE973[石油与天然气工程—石油机械设备]