输油管线螺旋焊口断裂失效的力学分析  

Mechanical analysis of the rupture failure of helical-weld pipe

作　　者：王力霞[1] 韩在鹏[2] 韩冰冰[3] 马春阳[1] 王权鑫[4] 

机构地区：[1]大庆石油学院机械科学与工程学院,黑龙江大庆163318 [2]大庆石油管理局供水公司,黑龙江大庆163451 [3]大庆油田技术培训中心,黑龙江大庆163255 [4]大庆油田有限责任公司第六采油厂,黑龙江大庆163314

出　　处：《大庆石油学院学报》2004年第4期58-60,共3页Journal of Daqing Petroleum Institute

摘　　要：分析了东北某输油管线螺旋焊口断裂失效的原因 ,计算了螺旋焊管及焊口应力、裂纹扩展速率和承载极限压力 .失效分析结果表明 :起源于未熔合区的焊接缺陷作为先天性裂纹 ,在输油管线输油的过程中 ,由于管线输送原油的压力波动而逐渐发生疲劳扩展 ,同时随着焊口部位剩余厚度的减少 ,当焊口承受的极限应力达到实际工作应力时管线将沿焊口发生断裂 .This Paper analyses the ruptured-failure of the helical-weld pipe of an oil transportation pipeline. By the stress analysis of the broken area of helical-weld pipe and the expanding speed calculation of crack and limited load ability, we consider that the welding bug comes from unfused area being inherited crack extends gradually because of pressure wave of the pipe in the course of working and the leaving thickness of weld-area reduces simultaneity. Finally the line breaks down along the weld area when the high pressure reaches the working stress.

关 键 词：输油管线 螺旋焊管 断裂失效 

分 类 号：TE973[石油与天然气工程—石油机械设备]