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通过分析双丝埋弧焊焊接过程和热源加热特点,建立了双丝焊接的几何模型和有限元模型.采用移动双椭球热源模型为双丝焊的焊接热过程的热源模型,阐述了一种新型双丝焊热场算法的设计思路和过程.利用有限元软件ANSYS二次开发工具即APDL语言改进和编写了移动双椭球热源的计算和加载程序.使用高效的数组存储、矢量操作命令进行热流值的分开计算和加载,提高了焊接模拟计算的效率,减小了数值模拟的计算量,实现了16 mm厚的钢板的双丝埋弧焊焊接过程的计算机仿真.通过实验验证了此算法的正确性和高效性,对实现大型焊接件焊接过程的数值计算具有一定的参考价值.
By analyzing the characteristics of double-wire submerged arc welding and heat source heating, the geometrical model and finite element model of double wire welding are established.Using the moving double ellipsoidal heat source model as the heat source model of the welding thermal process of double wire welding, The design idea and process of the new double-wire welding thermal field algorithm is improved and programmed by using the finite element software ANSYS secondary development tool called APDL language.Using efficient array storage and vector operation commands The calculation and loading of the heat flow value separately improve the efficiency of the welding simulation calculation and reduce the computational complexity of the numerical simulation and realize the computer simulation of the 16-mm thick double-wire submerged arc welding process.The experimental results show that this algorithm The correctness and efficiency of the welding process to achieve large-scale numerical calculation of the welding process has some reference value.