X80钢级Φ1016 mm管道四点弯曲试验数值分析  

Numerical Analysis of X80 Steel Grade Φ1 016 mm Pipe Four-point Bending Test

作　　者：张豫 朱立 李乃贤 贾彬[2] 刘雅晴 ZHANG Yu;ZHU Li;LI Naixian;JIA Bin;LIU Yaqing(Sichuan Deyuan Pipeline Technology Co.,Ltd.,Chengdu 610095,China;School of Civil Engineering andArchitecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]四川德源管道科技股份有限公司,成都610095 [2]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《焊管》2022年第8期10-16,共7页Welded Pipe and Tube

基　　金：四川省科技厅青年科技创新研究团队项目“高效抗爆刚-柔耦合复合防护结构设计”(项目编号2020JDTD0021)。

摘　　要：为了保证管道在四点弯曲试验时有足够长的区域满足纯弯曲条件,通过有限元模拟分析了X80钢级Φ1016 mm管道全尺寸四点弯曲试验时管道弯矩、剪力和轴向应变分布,以及管道在集中力作用下的轴向应变分布。结果表明:从内力角度来看,四点弯曲试验时,两个加载压头之间的管道满足纯弯曲条件;从轴向应变角度来看,四点弯曲试验时,管道中部2 m范围的区域满足纯弯曲条件;加载压头处管道会产生应变突变并产生一定范围的影响;长度12 m的X80钢级Φ1016 mm管道在四点弯曲试验时,应保证加载压头之间的间距≥4 m,从而保证管道中部至少有2 m长的区域满足纯弯曲条件。研究成果可为大直径管道全尺寸四点弯曲试验的开展提供理论依据。In order to ensure that the pipe has enough length to meet the pure bending condition in the four-point bending test,the distribution of bending moment,shear force and axial strain of X80 steel gradeΦ1016 mm pipe under full-size four-point bending test and axial strain distribution under concentrated force were analyzed by finite element method.The results show that from the angle of internal force,the pipe between two loading heads meets the pure bending condition in four-point bending test.From the angle of axial strain,the area within 2 m in the middle of the pipe in four-point bending test meets the pure bending condition.Strain mutation will occur in the pipe at the loading head and affect a certain range.In the four-point bending test of 12 m X80 steel gradeΦ1016 mm pipe,the spacing between loading heads should be≥4 m to ensure that at least 2 m long area in the middle of the pipe meets the pure bending condition.The research results can provide reference for the development of full-size four-point bending test of large-diameter pipelines.

关 键 词：X80钢级管道 四点弯曲试验 数值模拟 轴向应变分布 管道弯矩分布 

分 类 号：TG115[金属学及工艺—物理冶金]