横向滑坡载荷作用下埋地PE管道的损伤数值模拟  

Numerical Simulation of Damage of Buried PE Pipeline Suffering from Lateral Landslide Load

作　　者：燕集中[1,2] 沈利民 杨洪[3] 汤文亮 YAN Ji-zhong;SHEN Li-min;YANG Hong;TANG Wen-liang(Jiangsu Special Equipment Safety Supervision and Inspection Institute,Nanjing 210036,China;National Pressure Pipeline Component Quality Inspection and Testing Center,Nanjing 211162,China;School of Chemical Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]江苏省特种设备安全监督检验研究院,南京210036 [2]国家压力管道元件质量检验检测中心,南京211162 [3]中国矿业大学化工学院,徐州221116

出　　处：《科学技术与工程》2024年第17期7114-7121,共8页Science Technology and Engineering

基　　金：江苏省特种设备安全监督检验研究院科研基金[KJ(Y)2023017]。

摘　　要：埋地燃气输送管道服役环境复杂,其中滑坡地质灾害严重威胁管道的服役安全。以埋地聚乙烯(polyethylene,PE)管道为研究对象,利用ABAQUS有限元软件模拟了横向滑坡载荷作用下的管道损伤行为,探讨了滑坡参数(滑坡体位移量)、管道埋深以及内压对PE管力学性能的影响。研究结果表明:滑坡作用下埋地PE管最大偏移、最大Mises应力和最大主应变均位于管轴向横截对称面上。管道最大Mises应力随滑坡位移的增大而增大,管底为管道最终屈服点,屈服主要原因为管横截面被压扁变形。管道未屈服时,最大Mises应力随内压的增大呈现先减小后增大的现象,最大主应变随内压的增大而增大。最大Mises应力和最大主应变均随埋深的增大而增大。The service environment of buried gas pipeline is complex,and the service safety of pipeline is seriously threatened by the landslide geological disaster.Using the ABAQUS finite element software,the damage behavior of the buried polyethylene(PE) pipeline under the lateral landslide load was simulated.The effects of landslide parameters(displacement of landslide mass),pipeline buried depth and internal pressure on the mechanical properties of PE pipe were discussed.The results show that the maximum displacement,the maximum Von-mises stress and the maximum principal strain of the PE pipe are all located in the axial cross-section symmetry plane of the pipe.The maximum Von-mises stress of the pipeline increases with landslide displacement rising.The final yield point of the pipeline is located at the bottom of pipe.The main reason for this condition is attributable to the flattening deformation of the pipe cross section.When the pipeline does not yield,the maximum Mises stress first decreases and then increases with the increase of internal pressure,and the maximum principal strain increases with the increase of internal pressure.The maximum Mises stress and maximum principal strain increase with the increase of burial depth.

关 键 词：ABAQUS 有限元模拟 埋地PE管 横向滑坡 力学响应 

分 类 号：TE83[石油与天然气工程—油气储运工程]