高速动车组转向架部件结构的动力优化

Dynamic Structure Optimization Design of High-Speed Train Bogie Parts

为解决高速动车组运用时转向架部件结构的固有频率分布与轮轨激扰的频率分布接近问题,对转向架部件进行特征值灵敏度分析,确定部件结构参数对固有频率的灵敏程度.然后,选取灵敏结构参数为设计变量,采用改进的可行方向法对转向架部件以频率为约束条件、重量最小化为目标函数进行动力优化设计.优化后的转向架部件的一阶频率提高至42 Hz,从而使动车组运行具有更高的安全性.

Eigenvalue sensitivity of bogie parts is studied to determine sensitivity level of component structures to natural frequency in order to solve the propinquity of natural frequency of the bogie parts and wheel-rail vibration frequencies.By the sensitive components as design variables,natural frequency as constraint,and minimization of the parts weight as objective function,dynamic optimization of the bogie parts is performed on the basis of improved feasible direction method.The first frequency of the modified parts is increased to 42 Hz,and operation safety of the high-speed train is improved.