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利用计算机仿真技术建立铸造机主链轮T型接头焊接的有限元模型,采用生死单元技术对T型接头焊接过程中的温度场和应力场进行了数值模拟。温度场模拟结果与实际焊接过程较为相符;应力场模拟结果表明,最大纵向残余应力位于焊缝上表面,最大横向残余应力和厚度方向残余应力分别位于焊缝与翼板和腹板的交接处。并得到了铸造机主链轮T型接头的三维焊接温度场和应力场的动态模拟分析方法。
The finite element model of T-joint welded on the main sprocket of casting machine was established by computer simulation technology, and the temperature field and stress field of T-joint were numerically simulated by the way of life-and-death element. The simulation results of temperature field are in good agreement with the actual welding process. The simulation results of stress field show that the maximum longitudinal residual stress is located on the upper surface of the weld, and the maximum transverse residual stress and the residual stress in the thickness direction are located at the intersection of weld and flange and web. The dynamic simulation analysis method of the three-dimensional welding temperature field and stress field of the main sprocket of the casting machine is obtained.