基于APDL的多丝埋弧焊温度场模拟的算法研究

Study of multi-wires SAW temperature field algorithm procedures based on APDL

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 difficulty on simulation of multi-wires submerged arc welding（SAW） temperature field is loading and calculation of heat-flow density.Under condition of arc deflection,the double ellipsoid heat source model,superposition principle and ANSYS parameter design language（APDL） were employed in the loading and calculation for the moving heat-flow density.In the calculation program,the scalar parameters instead of array were employed,which ensures completion for the calculation in one cycle,and avoids the problem of excessive computation by the array storage,recall and extensive in the loops.The results of calculation and tested weld pool shape show that the computational accuracy gets higher level,which can be applied to the thermal calculation and loading of temperature field for multi-wires SAW.