Based on Gaussian heat source model and double ellipsoid heat source model respectively, the calculating formulas of two models in double wire welding were derived, the proper finite element model was constructsed.

• 摘要分别以高斯热源模型及双椭球形热源模型为基础，推导出两种模型用于双丝焊的计算公式，建立了合适的有限元模型。