【摘要】 基于ANSYS软件,采用移动旋转高斯体热源函数加载,对12mm厚板铝合金YAG激光—MIG电弧复合焊接进行了温度场有限元数值模拟,模拟中综合考虑了对流、辐射和热传导对焊接热过程的影响,将模拟结果与相同工艺条件下实际的焊接试验结果进行了比较,验证了旋转高斯体热源模型在厚板铝合金复合焊接中的适应性。采用同样的数值模拟热源和试验模拟方法,同样得到了该铝合金5mm板模拟结果与实际结果相当一致的结论。从而为不同焊接工艺条件下铝合金中、厚板激光—电弧复合焊接焊缝形状和尺寸预测提供了一种有效的途径。更多还原

【Abstract】 YAG-MIG hybrid welding temperature field of 12 mm alluminun alloy plate was simulated using Gauss revolving heat source function by ANSYS. Convection, radiation and conduction were all considered during the simulation process. The Gauss revolving heat source was loaded through function table and its movement was realized by ANSYS Parameter Design Language. Simulated results agree well with the measured results.It concluded that Gauss revolve heat source was quite for the temperature field simulation of thick aluminum alloy hybrid welding.The comformability of experimentel result and simulation was also obtained for the 5 mm aluninun alloy plate.This methed was proved to be an efficient way to predict the shape and dimention of welded joints for YAG-MIG hybrod welding of thick aluminum alloy plate.更多还原