大直径螺旋埋弧焊管弯曲变形能力的模拟研究  

Bending Deformation Capacity of Large⁃diameter Submerged⁃arc Welded Helical Pipe

作　　者：方伟 陈心怡 吕华(编译) FANG Wei;CHEN Xinyi;LYU Hua(CNPC Engineering Materials Research Institute Co.,Ltd.,Xi'an 710077,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,西安710077

出　　处：《焊管》2024年第4期51-58,共8页Welded Pipe and Tube

摘　　要：通过有限元模拟研究了基于应变设计的大直径螺旋埋弧焊管的弯曲变形能力。钢管在弯曲载荷下的主要失效模式是管壁局部屈曲变形,通过数值分析得出弯矩、曲率和椭圆度的变化情况,并与外径1067 mm、D/t分别为67和119的两根钢管获得的试验数据进行比较,还分析了材料的实际性能、初始几何缺欠以及残余应力对螺旋埋弧焊管局部屈曲变形的影响。模拟计算得到的临界弯曲应变和曲率与实物试验结果均与现有的经验公式计算结果一致。Through finite element simulation,the bending deformation capacity of large diameter submerged⁃arc welded helical pipe designed based on strain design is studied.The main failure mode of steel pipes under bending load is local buckling deformation of the pipe wall.Bending moment,curvature and ovalization are monitored through the numerical analysis,and comparison is conducted with available test data on two 1067 mm diameter pipes,with D/t ratio of 67 and 119,described in detail.The actual performance of the material,initial geometric defects,and residual stress on the local buckling deformation of submerged⁃arc welded helical pipe were also analyzed.The critical bending strain and curvature obtained from simulation calculations are consistent with the results of physical experiments and existing empirical formulas.

关 键 词：大直径 螺旋埋弧焊管 弯曲变形 弯曲曲率 

分 类 号：TE973.6[石油与天然气工程—石油机械设备]