曲面三明治结构激光焊接变形数值模拟研究  

Numerical Simulation on Laser Welding Deformation of Sandwich Structure with Curved Surface

作　　者：邵晨东 马江坤 黄舒宇 兰玲 吴广明[4] 芦凤桂[1] SHAO Chendong;MA Jiangkun;HUANG Shuyu;LAN Ling;WU Guangming;LU Fenggui(School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240;Aerospace System Engineering Shanghai,Shanghai 201109;Shanghai Shipbuilding Technology Research Institute,Shanghai 200032;China Ship Development and Design Center,Shanghai 201108)

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]上海宇航系统工程研究所,上海201109 [3]上海船舶工艺研究所,上海200032 [4]中国舰船研究设计中心,上海201108

出　　处：《机械工程学报》2025年第6期121-132,共12页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(U2141213,52171040,52001200)。

摘　　要：基于热-弹-塑性有限元法及固有应变理论,通过ABAQUS通用有限元仿真平台计算了曲面三明治结构激光焊接变形。首先,针对曲面激光焊T型接头,基于考虑材料非线性、几何非线性和接触非线性的热-弹-塑性有限元法对其焊接变形进行模拟计算,并与试验结果进行对比,验证热源及材料模型的预测精度达95%以上。探究不同拘束状态对焊接变形的影响规律,并对比热-弹-塑性有限元法及固有应变方法的计算结果,以保证固有应变法对焊接变形的预测结果可靠性。基于固有应变法探究焊接顺序对曲面三明治结构焊接变形的影响规律。结果表明,通过采用先中间后两边的焊接顺序,可有效控制曲面三明治结构的面板间距变化在0.6mm以内,能满足大构件制造精度的要求。通过在热弹塑性方法中考虑不同拘束作用的影响,可有效提高固有应变法对大型结构焊接变形的预测精度。Based on the thermal-elastic-plastic finite element method(TEP-FEM)and inherent strain theory,the laser welding deformation of curved sandwich structure was calculated with ABAQUS general finite element simulation platform.Firstly,for the curved laser welding T-joint,the welding deformation was simulated based on the TEP-FEM considering material nonlinearity,geometric nonlinearity and contact nonlinearity,and compared with the test results to verify the prediction accuracy of the heat source and material model was higher than 95%.Then,influence of different constraint conditions on welding deformation was investigated,and the calculation results of TEP-FEM and inherent strain method were compared to guarantee the reliability of the prediction results of welding deformation by inherent strain method.Finally,based on the inherent strain method,influence of welding sequence on the welding deformation of the curved sandwich structure was investigated.Results showed that by using the welding sequence of middle welds before side welds,the distance change of panels of the curved sandwich structure could be effectively controlled within 0.6 mm,which can satisfy the welding requirement of large structures.By considering the effect of different constraint effect in the TEP-FEM,the prediction accuracy of welding deformation can be improved through inherent strain theory for large structures.

关 键 词：焊接变形 固有应变 数值模拟 结构拘束 焊接顺序 

分 类 号：TG404[金属学及工艺—焊接]