为了研究大管径拱肋环焊缝焊接接头残余应力分布规律，用ANSYS软件对直径1 400 mm，厚度26 mm的拱肋环焊缝进行了焊接温度场及应力场数值模拟. 分析了焊接过程的温度分布云图及应力分布云图，获取了特征节点的热循环曲线，分析了焊后内外表面各残余应力分布情况及内表面残余应力形成过程. 结果表明，等效残余拉应力峰值出现在钢管内表面焊缝底部. 焊后径向和环向残余应力在内、外表面大部分区域形成压应力，轴向残余应力在内、外表面形成拉-压相间的应力分布，等效残余应力在内、外表面均为拉应力. 残余应力形成过程中，第2 ~ 7层的径向、环向、轴向及等效残余应力曲线与第1层径向、环向、轴向及等效残余应力曲线相比，除在波峰及波谷处有较小变化外，其它区域残余应力几乎不变.
In order to study the residual stress distribution law of the large diameter arch rib girth weld joint, this paper uses ANSYS software to carry out the numerical simulation of the welding temperature field and stress field of the arch rib girth weld with a diameter of 1 400 mm and a thickness of 26 mm. The thermal cycle curve of the characteristic node is obtained,The contour of temperature and the stress distribution as well as the residual stress distribution and formation process are analyzed. The results show that the peak value of the equivalent tensile residual stress appears at the bottom of the weld on the inner surface of the steel pipe. the radial and circumferential residual stresses form compressive stress in most areas of the inner and outer surfaces in the end. The axial residual stress forms a tension-compression stress distribution and The equivalent residual stresses are tensile stress on both surfaces. During the formation of residual stress,the residual stress curves including the radial,the circumferential,the axial and tht equivalent of the 2nd to 7th layers are almost unchanged coMpared with the first layer, except for small changes in the wave trough and peak.
[1] 陈宝春, 韦建刚, 周俊, 等. 我国钢管混凝土拱桥应用现状与展望[J]. 土木工程学报, 2017, 50(6): 50 - 61
Chen Baochun, Wei Jiangang, Zhou Jun, et al. Application status and prospect of concrete-filled steel tube arch bridge in china[J]. China Civil Engineering Journal, 2017, 50(6): 50 - 61
[2] 赵人达, 张正阳. 我国钢管混凝土劲性骨架拱桥发展综述[J]. 桥梁建设, 2016, 46(6): 45 - 50
Zhao Renda, Zhang Zhengyang. Review on the development of concrete filled steel tubular rigid frame arch bridge in China[J]. Bridge Construction, 2016, 46(6): 45 - 50
[3] 魏雷, 魏淳. Q460钢T型接头单边开坡口非对称焊接的数值模拟[J]. 热加工工艺, 2019, 48(7): 244 - 246
Wei Lei, Wei Chun. Numerical simulation of asymmetric welding of Q460 steel T-joint with unilateral groove[J]. Hot Working Technology, 2019, 48(7): 244 - 246
[4] 陈梅峰, 郭玉龙, 周广涛, 等. TC4钛合金薄板激光焊接变形的有限元模拟[J]. 机械工程材料, 2019, 43(7): 74 - 78
Chen Meifeng, Guo Yulong, Zhou Guangtao, et al. Finite element simulation of laser welding deformation of TC4 titanium alloy sheet[J]. Materials and Testing, 2019, 43(7): 74 - 78
[5] 方乃文, 王丽萍, 李连胜, 等. 镁合金圆筒舱体DE-GMAW焊接数值模拟[J]. 焊接学报, 2018, 39(7): 29 - 32
Fang Naiwen, Wang Liping, Li Liansheng, et al. Numerical simulation of DE-GMAW welding of magnesium alloy cylinder cabin[J]. Transactions of the China Welding Institution, 2018, 39(7): 29 - 32
[6] Long H, Gery D, Carlier A, et al. Prediction of welding distortion in butt joint of thin plates[J]. Materials and Design, 2009(30): 4126 - 4135.
[7] Yang Zhibin, Tao Wang, Li Liqun, et al. Numerical simulation of heat transfer and fluid flow during double-sided laser beam welding of T-joints for aluminum aircraft fuselage panels[J]. Optics and Laser Technology, 2017, 91: 120 - 129.
[8] 任森栋, 毕涛, 李索, 等. P92钢多层多道焊接接头残余应力的有限元模拟[J]. 机械工程材料, 2019, 43(11): 42 - 46
Ren Sendong, Bi Tao, Li Suo, et al. Finite element simulation of residual stress in P92 steel multi pass welding joint[J]. Materials for Mechanical Engineering, 2019, 43(11): 42 - 46
[9] Ma Ninshu, Cai Zhipeng, Huang Hui, et al. Investigation of welding residual stress in flash-butt joint of U71Mn rail steel by numerical simulation and experiment[J]. Materials & Amp Design, 2015, 88: 1296 - 1309.
[10] Mahapatra M M, Datta G L, Pradhan B, et al. Modelling of angular distortion of double-pass butt-welded plate[J]. Journal of Engineering Manufacture, 2007, 222: 391 - 401.
[11] Liu C, Zhang J X, Xue C B. Numerical investigation on residual stress distribution and evolution during multipass narrow gap welding of thick-walled stainless steel pipes[J]. Fusion Engineering & Design, 2011, 86(4-5): 288 - 295.
