【摘要】 深入分析了激光焊接小孔传热模型的特点 ,在此基础上选取合适的热源形式 ,研究了移动线热源和高斯分布热源作用下 ,准稳态与瞬态激光焊接温度场。利用MAT LAB软件及ANSYS有限元分析程序对激光焊接温度场分别进行了计算及模拟 ,并且将两种分析结果进行了比较。最后还将有限元的模拟值与实测值进行了对比分析 ,进一步验证了小孔模型与高斯热源在激光焊接温度场模拟中的适用性。更多还原

【Abstract】 The character of keyhole model in laser welding is deeply analyzed.Based on that,the appropriate models of heat source are applied.The quasi steady and transient temperature fields with a moving line heat source and a gauss heat source are studied.By using MATLAB and ANSYS,laser welding temperature fields are calculated and simulated separately.Comparison between the two results has showed the precision of the models.Finally,the comparison between the experiment results and the simulated results has also validated the applicability of the keyhole model and gauss heat source model.更多还原