砼管支撑加强环焊接工艺研究  

Numerical Simulation and Application of Concrete Pipe Support Welding

作　　者：吴香清 尚保玉 彭和永 Wu Xiangqing;Shang Baoyu;Peng Heyong(Chinese National Engineering Research Center of Concrete Machinery,ZOOMLION,Changsha 410013,China)

机构地区：[1]中联重科国家混凝土机械工程技术研究中心,长沙410013

出　　处：《机电工程技术》2021年第1期80-82,共3页Mechanical & Electrical Engineering Technology

摘　　要：臂架砼管支撑的破坏类型有焊接裂纹、焊接结构的延性破坏和脆性破坏、疲劳破坏,但以冷裂纹、疲劳开裂为主。从3个方面进行了开裂原因分析,并通过MSC.Marc焊接数值模拟方法,计算了不同拘束及焊接顺序对砼管支撑焊接残余应力的影响。研究结果表明,减少砼管支撑结构的拘束和改变焊接顺序均可明显降低焊接残余应力。The failure types of cantilever concrete pipe support include welding crack, ductile failure, brittle failure and fatigue failure of welded structure, but mainly cold crack and fatigue crack. The causes of cracking were analyzed from three aspects, the welding process of different concrete pipe support structure was numerically simulated with MSC.Marc. According to the results of verification test, the welding residual stress can be reduced obviously by changing the restraint or welding sequence of the concrete pipe support structure.

关 键 词：加强环 焊接顺序 数值模拟 残余应力 

分 类 号：TG457.2[金属学及工艺—焊接]