X60钢管道环焊缝含气孔缺陷应力有限元分析  

Finite Element Analysis of Pipeline Girth Weld of X60 Steel with Pore Defects

作　　者：许志军 储玲玉 鲍庆河 李鑫 徐杰[2] XU Zhijun;CHU Lingyu;BAO Qinghe;LI Xin;XU Jie(SINOPEC Oil&Gas Pipeline Inspection Co.,Ltd.,Xuzhou 221008,China;School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,China;Xuzhou BUT Construction Machinery Joint-Stock Co.,Ltd.,Xuzhou 221004,China)

机构地区：[1]中石化长输油气管道检测有限公司,江苏徐州221008 [2]中国矿业大学材料与物理学院,江苏徐州221116 [3]徐州巴特工程机械股份有限公司,江苏徐州221004

出　　处：《热加工工艺》2022年第13期107-111,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51301197);江苏省自然科学基金资助项目(BK20130182);中国石油化工股份有限公司资助项目(318019-2);国家重点研发项目(2018YFB2001204)。

摘　　要：受焊接工艺和外界影响,气孔缺陷在管道焊接过程中很难避免,对其尺寸控制至关重要。基于有限元分析方法,采用ABAQUS软件,建立了含气孔缺陷管X60钢道环焊缝的非线性有限元模型。探讨了气孔大小及其沿管壁径向不同位置以及焊缝余高等对管道环焊缝应力的影响。结果表明:气孔缺陷周边应力变化明显,且不同载荷条件下应力峰值位置不同,分别在管道设计压力和极端压缩载荷条件下,应力峰值位于气孔在管道轴向上的边缘;在极端拉伸载荷条件下,应力峰值转移到气孔在管道径向上的边缘。随着孔径增加,管道环焊缝的最大等效应力明显增大;且气孔越靠近管壁内外表面,管道环焊缝的最大等效应力越大。Due to the influence of welding technology and the environment, it is very difficult to avid pore defect in the process of pipeline welding, which is quiet important for the pore size control. Based on the finite element method, the ABAQUS software was used to establish the nonlinear finite element model of pipeline girth welds of X60 steel containing porosity defects. The influence of the pore size, its location along the radial direction of the pipe wall and the weld reinforcement on the girth weld stress was discussed. The results show that the stress around the pore defect varies significantly and the peak stress position is different under different load conditions. Under the conditions of pipeline designed pressure and extreme compressive load, the peak stress is located at the pore edge in the axial direction. Under extreme tensile load, the peak stress is transferred to the pore edge in the radial direction. With the increase of pore diameter, the maximum equivalent stress of girth weld increases obviously. The closer the pore is to the inner and outer surfaces of the pipe wall, the bigger the maximum equivalent stress of girth weld is.

关 键 词：管道环焊缝 气孔缺陷 有限元分析 焊缝余高 

分 类 号：TG404[金属学及工艺—焊接]