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焊接温度场的分析是焊接研究的基础,多丝埋弧焊焊接温度场模拟的难点在于热流密度的计算和加载。在考虑了焊丝偏转的情况下,采用双椭球热源模型,并应用叠加原理,使用APDL(ANSYS Parameter Design Language)完成移动热源热流密度加载计算。在计算程序中采用标量参数而不用数组,保证其在一次循环中完成计算工作,从而避免了大量数值存储、调用、循环造成的计算量过大。通过三丝埋弧焊直缝管焊接温度场计算和焊缝形状对照结果表明:该方法的计算精度能够达到预计的精度,可以用于多丝埋弧焊焊接温度场的计算。
The analysis of welding temperature field is the basis of welding research. The difficulty in simulating the temperature field of multi-wire submerged arc welding lies in the calculation and loading of heat flux. Considering the wire deflection, the dual ellipsoidal heat source model is adopted, and the superimposition principle is applied to calculate the heat flux of mobile heat source using APDL (ANSYS Parameter Design Language). Scalar parameters are used in the calculation program without an array, to ensure that they complete the calculation in a loop, thus avoiding a large amount of numerical storage, call, loop calculation caused by excessive. The calculation of the welding temperature field and the comparison of the weld shape by the three-wire submerged arc welding show that the calculation accuracy of the method can reach the expected accuracy and can be used for the calculation of the temperature field of the multi-wire submerged arc welding.