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以Q345D低合金高强钢T型接头双面焊接过程的数值模拟为研究对象,利用SYSWELD有限元分析软件,选择双椭球热源模型,模拟不同焊接工艺下Q345D钢T型接头双面焊接过程。数值模拟时,考虑材料热物理性能与温度的非线性关系,以及相变潜热对温度场的影响。基于模拟结果,预测了不同焊接工艺下的温度场、变形场和引力场的演变规律及分布特征,并进行了理论分析。
Taking QS45D low-alloy high-strength steel T-joint as the research object, the double-spheroid heat source model was selected by SYSWELD finite element analysis software to simulate the double-side welding process of Q345D T-joint under different welding conditions. In numerical simulation, the nonlinear relationship between the thermophysical properties of the material and the temperature and the influence of the latent heat of phase transformation on the temperature field are considered. Based on the simulation results, the evolution and distribution characteristics of temperature field, deformation field and gravitational field under different welding processes are predicted and analyzed theoretically.