基于SYSWELD的CRH_2-300铝合金车体缓冲梁和牵引梁焊接数值模拟

Numerical simulation of welding for the buffer beam and traction beam on the CRH_2- 300 aluminum alloy car body based on SYSWELD

高速列车缓冲梁和牵引梁连接部位处焊缝是机车车体焊缝中最重要的焊缝之一,选用法国ESI公司开发的热加工专业计算软件SYSWELD对300 km/h动车组车体(二阶段)缓冲梁和牵引梁连接部位焊接接头和结构的焊接残余应力进行模拟计算。对不同焊接线能量和不同焊接顺序下的铝合金车体缓冲梁和牵引梁连接部位的焊接残余应力大小进行模拟,结果表明优化焊接顺序和焊接线能量可以有效减少焊接残余应力,对实际生产具有一定指导意义。

The buffer beam and the traction beam connection weld of High - speed is one of the most important weld in locomotive car body welding seam,The residual stress distribution on the welded joints of the 300 km/h buffer beam and traction beam connection parts of bullet train（ phase 2 ）was analyzed by the ESI company development hot working professional computing software SYSWELD. The residual stress distribution on the welded joints of the buffer beam and traction beam connection parts was analyzed for different weht heat input and different welding sequence. The results showed that the optimum welding sequence and welding heat input can effec.tively reduce the generation nf residual stress.the production has a certain guiding significance in reality.