驱动系统悬挂结构对轴箱内置式转向架动态性能的影响OA北大核心

To optimize driving system's suspension structure of the inner axlebox bogie and improve service safety and reliability of the railway vehicles,a dynamics model of the inner axlebox vehicle considering driving and trans-mission system was established using the theories of gear dynamics and vehicle system dynamics and the multibody dynamics software SIMPACK.On the basis of the current driving system's suspension form of the bogie,three dif-ferent suspension structures were proposed in this study.The proportion of traction motor mass allocated to primary unsprung and sprung under different driving system's suspension structures is analyzed.In addition,with the con-sideration of the internal and external excitation such as gear meshing and track random irregularity,and different driving system's suspension structures,this study investigates the dynamics characteristics such as the vibration re-sponses of key components like traction motor,displacements of the coupling,dynamics forces at suspension points of driving system at different speeds,which revealed the effect of different driving system's suspension structures on dynamics performances of the inner axlebox bogie.The results show that the connecting rubber nodes between the gearbox and motor can limit their relative displacement and effectively protect the coupling.However,it also in-creases the transmission path of vibration from the wheel-rail surface to frame and driving system,leading to a sig-nificant increase in vibration levels of traction motor,frame,and other key components.In addition,reducing the number of rubber nodes between the gearbox and motor can decrease the mass of driving system allocated to the pri-mary unsprung and the gearbox-axle joint vertical force.However,it would increase the vertical force on the motor suspension point and the gearbox rod joint.These results can provide a reference for the design of driving system's suspension structure of the inner axlebox power bogie.