The combined model with Gauss surface heat source and cylindrical heat source was used according to both the nail-shaped weld and the deep penetration of electron beam welding.

• 针对电子束焊接特有的钉头状焊缝及其穿透深度大的特点,采用高斯面热源与柱体热源组成的组合热源模型,对焊接温度场进行分析,模拟结果与实际焊缝取得了良好的一致。