高速列车自主创新中的虚拟焊接技术

Application of virtual welding technology in high speed train

利用数值仿真技术开展高速动车转向架、地板等大部件的虚拟焊接。针对大型焊接结构计算的难点,采用先进热源模型及高效计算方法,测试不同温度下铝合金、耐候钢等高铁用材料的热物理参数,建立高铁虚拟焊接用基本材料热物理参数库,开展高速动车车体结构的虚拟仿真计算。结果表明,此技术可指导车体焊接工艺优化,优化车体结构设计,降低焊接变形和制造成本,改善制造质量,提高产品服役性能。

Virtual welding was applied to welding technology and structure optimization in large welding structure,such as bogie and floor of high speed train. The numerical methods,such as cluster banding heat source model and local-global method,were used in virtual welding of large welding structure. The thermo-physical parameters of aluminum,low alloy steel were measured for accurate simulation and establishment of parameter database. The models for high speed train series were promoted by virtual welding. The results show that the train body structure design is optimized by virtual welding technology,so the manufacturing quality is improved and the cost is reduced.