基于FEA计算机模拟的激光透射轮廓焊接工艺

Research on laser transmission profile welding technology based on FEA computer simulation

采用有限元分析和实验设计对激光透射轮廓焊接工艺进行系统模拟。通过开发的三维热源模型,模拟带有移动热源的激光透射轮廓焊接工艺。采用商业ANSYS多物理场有限元软件,通过实施高斯体积热源模型,并结合对流辐射边界条件,获得数值结果。将实验设计与回归分析结合,设计实验,并在仿真结果的基础上开发数学模型。四个关键工艺参数,即功率、焊接速度、光束直径以及吸收聚合物中碳黑含量作为自变量,而焊接面最高温度、焊缝宽度以及透明和吸收聚合物中焊缝深度作为因变量。灵敏度分析可以用来确定自变量的不同取值如何影响某个因变量。

Finite element analysis（FEA） and design of experiments（DoE） techniques are used to systematically model laser transmission profile welding technology in this study. The laser transmission profile wehting technology with a movving heat source is simulaled by developed /hree-dimensional thermal model. Through a Gaussian volu,ne heat source model,the commercial ANSYS multi-physics finite element software is used to achieve numerical resuh by combining with convection radiation boundary conditions. The experiments are carried out by combining experimental design with regression analysis ,and the mathematical models are developed on the basis of simulation results. As independent variables,the four key prucess parameters are power,welding speed,beam diameter and carbon black content in absorbing polymer,while the dependent variables are maximum temperature on the face of welding,weht width,and weld depths in transparent and absorbing polymers. Sensitivity analysis can be used lu confirm how the different values of an independent variable to influence the dependent variables.