动车组典型焊接构件残余应力数值模拟研究  

Research on Numerical Simulation of Residual Stress of Typical Welding Components for Multiple Units

作　　者：弓瑞明 陈刚辉 朱忠尹[2] GONG Ruiming;CHEN Ganghui;ZHU Zhongyin(CRRC Guangdong Co.,Ltd.,Jiangmen 529100,China;School of Materials Science and Engineering of Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中车广东轨道交通车辆有限公司,广东江门529100 [2]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《铁道车辆》2021年第3期13-16,45,共5页Rolling Stock

摘　　要：通过对动车组侧墙与车顶连接构件的焊接残余应力进行数值模拟,对比分析了X射线衍射(XRD)测试数据与计算值,验证了测试结果与经验值基本吻合;通过数值模拟计算值与XRD测试值相互验证了测试规律的一致性和测试结果的可靠性;针对车体在生产制造过程中出现的典型问题(车顶凹陷变形)进行了分析,优化了焊接工艺。Through the numerical simulation of welding residual stress of side wall and car roof connection for multiple units,the test data and calculated value of X-ray diffraction(XRD)are analyzed,it is verified the test results are basically consistent with empirical value.Both the calculated value of numerical simulation and test value of XRD mutually verify the consistency of test rule and reliability of test result.The typical problems of car body(sunken deformation of car roof)appeared in manufacturing process are analyzed,and the welding process is optimized.

关 键 词：残余应力 数值模拟 XRD 焊接工艺 

分 类 号：U270.32[机械工程—车辆工程]