Deformation’s Simulation On End Walls Of The Aluminum Alloy High-Speed Train

With the rapid development of science and technology, and the high-speed train technology is also rising, more and more high quality of high-speed train is required. Welding is one of the key means of production of high-speed train. So controlling the deformation of the high-speed train body is very important. The welding deformation not only will destroy the train’s overall shape, but also the deviation will appear in the body assembly. In this way, it would seriously affect the production of high-speed train. Therefore, mastering the law of deformation of aluminum alloy body plays an important role in the development of high-speed body.This paper uses the large finite element software SYSWORLD which comes from ESI in France. This paper simulates the welding deformation of a particular model of high-speed train aluminum alloy body end walls. The end wall is composed by A6N01S-T5aluminum alloy. The main welding method is used in MIG welding. First, a whole model of the end wall is created according to the structure and size of the end wall. Second, the local model (T-joint) is extracted according to the characteristics of the overall model of the end wall, then the double ellipsoid heat source is adopted and in SYSWORLD local model simulated. Technology of WME is saved and the local model results are saved. And this paper use SYSWORLD software plug-ins inside the PAM-ASSEMBLY (PA), and simulate the overall deformation of the end wall."Local-global" method constitutes the basic principles of the PA. These papers simulate the overall deformation of the end wall by changing the welding sequence and constraints of the end wall. And this paper come to the law of deformation of the end wall:(1) Under the same constraints and the different welding sequence, end wall deformed different. The minimum deformation of the end wall appears in the welding sequence1while the maximum deformation appears in the welding sequence3.(2) Under the different constraints and the same welding sequence, end wall deformed different. The deformation of the end wall decreased gradually under the program of constraint from1-3. Minimum deformation of the end wall appears in program of constraint3.(3) The end wall of optimal welding method is to adopt the program of constraint3and the welding sequence1. And deformation of the end wall is minimal at this time.(4) Under the same constraints and the different welding sequence, the maximum deformation of the end wall position distribution is basically the same. The end wall deformation is focused on both sides of the end wall under program of constraint1. The maximum deformation of the end wall is concentrated in the end wall near the door right column under program of constraint2.But deformation of the end walls symmetrically distributed under the welding sequence4. And maximum deformation also appeared in the end wall near the door left column. The maximum deformation of the end wall appeared in the end door in the wall near the right column and top right under program of constraint3.But the maximum deformation of the end wall also appeared in the end door in the wall on the left column near the left top position under the welding sequence4.