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采用ANSYS有限元分析软件,分别以双椭球热源模型和均匀体热源模型对Q345中厚板多层焊的温度场进行模拟,以研究不同热源模型的作用特点及其对焊接温度场的影响。结果表明:在相同的焊接条件下,均匀体热源和双椭球热源的温度场基本一致,采用均匀体热源的焊接熔池也呈椭球形。与椭球热源相比,采用均匀体热源模型的温度场仿真结果更符合实际。但采用均匀体热源时,焊缝起始位置的温度偏低。因此,在焊接温度场仿真过程中,焊接的起始位置采用双椭球热源,其它位置采用均匀体热源,是一种较为理想的焊接能量施加方式。
The finite element analysis software ANSYS was used to simulate the temperature field of Q345 multilayer multi-layer welding by using the dual ellipsoidal heat source model and the homogeneous body heat source model respectively to study the effects of different heat source models and their effects on the welding temperature field. The results show that under the same welding conditions, the temperature field of uniform body heat source and double ellipsoidal heat source are basically the same, and the welding pool with homogeneous body heat source is also ellipsoidal. Compared with the ellipsoid heat source, the simulation results of the temperature field using the uniform heat source model are more realistic. However, when the uniform body heat source, the starting position of the weld temperature is low. Therefore, in the welding temperature field simulation process, the starting position of welding using double ellipsoidal heat source, the other position using a uniform body heat source, is a more ideal welding energy application.