双层铝合金车体焊接结构设计

Design of welding structure for double layer aluminum alloy train body

依照双层铝合金车体总体设计规范的要求,以车辆动态包络线作为车体断面设计的约束条件,进行车体的三维设计和详细结构设计,按照EN 15085的焊接标准要求优化双层铝合金车体焊接结构,同时对车体母材与焊接材料进行优化匹配。经车体静强度试验验证,优化后的焊接接头型式减少了车体大部件和车体总成的焊接变形,适合车体的模块化制造需求。通过计算车体静强度,证明250 km/h双层铝合金试验车体的强度符合EN 12663要求,产品的安全性、可靠性满足欧洲铁路客车强度规范。

The 3D design and detailed structure design of the train body are carried out according to the requirements of overall design specifications for the double layer aluminum alloy train body and the constraint condition of taking vehicle dynamic envelope line as the design of train body section. The welding structure of double layer aluminum alloy train body is optimized according to EN 15085 standard welding requirements, in the meanwhile, the base material of train body and welding material are optimized and matched. The static strength test of train body shows that the optimized welded joint type not only reduces the welding deformation of the large parts and assembly of the train body but also meets the modular manufacturing demands of train body. By calculating the static strength of train body,it＇s proved that the strength of the double layer aluminum alloy train body with the speed of 250 km/h meets the requirements of EN 12663, and its safety and reliability meet the strength specifications of European train.