J55膨胀套管抗挤毁强度的计算与模拟  

Calculation and Simulation of Collapse-resistance Strength for J55 Expansion Casing

作　　者：李周波[1,2] 芦琳[1,2] 鲁碧为[1,2] 强康 翟龙强 

机构地区：[1]宝鸡石油钢管有限责任公司,陕西宝鸡721008 [2]国家石油天然气管材工程技术研究中心,陕西宝鸡721008

出　　处：《焊管》2014年第7期23-26,共4页Welded Pipe and Tube

基　　金：中国石油天然气集团公司科技管理部攻关项目;膨胀管新产品技术研究(2011A-4209)

摘　　要：研究了J55膨胀管的壁厚误差、椭圆度、残余应力对其抗挤强度的影响。并利用ANSYS有限元对J55膨胀管实际抗挤毁过程进行了仿真模拟,结果表明:壁厚的减小降低抗挤强度,壁厚的增加提高抗挤强度。随着椭圆度的增加,套管抗挤强度不断地减小。轴向残余拉应力使套管的抗挤强度明显降低,径向残余应力对套管抗挤强度的影响基本上呈线性规律。通过理论计算结果和模拟结果的比较,验证了模拟的合理性。In this article, it studied the effect of J55 expansion casing wall thickness deviation, ovality and residual stress on its collapse-resistance strength. Furthermore, it utilized ANSYS FEM software to simulate the collapse-resistance process. The results showed reducing wall thickness can low collapse-resistance strength, and increasing wall thickness can enhance collapse-resistance strength. With ovality increasing, the collapse-resistance strength reduces continually. The axial residual tensile stress significantly reduces the collapse-resistance strength of expansion casing, and the influence of radial residual stress on collapse-resistance strength is basically linear. Through the comparison of theoretical calculation and simulation results, the rationality of the simulation was verified.

关 键 词：焊管 膨胀管 有限元法 抗挤强度 残余应力 

分 类 号：TG406[金属学及工艺—焊接]