|关键词: 不锈钢 车顶骨架结构 数值模拟 变形
|Research on welding deformation of welded stainless steel vehicle roof structure by experiment and numerical simulation
Li Chunguang,Yin Hongquan,Xiang Yinqiang,Yang Kelu
|The experimental and numerical investigation of the welding deformation of urban rail vehicle roof were carried out. The inherent strain model of urban rail vehicle roof was built. The whole welding process including free deformation period,clamping before welding period,clamping after welding period,and without clamping after welding period was simulated to obtain the deformation of each period. The numerical simulation results had good agreement with experimental data,and the average error of simulation model was about 20% which was accuracy enough to reflect the deformation trend. The deformation of the last two stage was significantly large. The maximal deformation appeared at the ends of roof structure where the restraint was less than other locations.
|Key words: stainless steel roof structure numerical simulation deformation