A finite element model of vertical coupling vibration of vehicle and steel spring floating slab track is established to analyze their vertical vibration characteristics under the action of vehicle loads.The research results show that the vertical vibrations of the rail and the carbody have obvious peaks at the first order bending frequency(10 Hz)of the floating slab,the P2 resonance frequency,some modal frequencies of wheelset bending and wheel web.The vibration of the carbody has also an obvious peak at about 1 Hz.The influence of fastener stiffness and damping is mainly below the first order bending frequency of the wheelset,and the fastener damping also has a great influence on the vertical vibration of the track at high frequencies.The influence of steel spring stiffness and damping on the vehicle and track responses is mainly around the first order bending frequency of the floating slab,which affects significantly the ride comfort of the vehicle.The vehicle suspension parameters as well as the masses of the carbody and bogie frame have little effect on the track vibration.The unsprung mass affects the track vibration through the P2 resonance,the first order bending of the wheelset under system constraints,and the symmetrical umbrella mode of the wheel web.Increasing the stiffness and damping of the primary suspension and the damping of the secondary suspension will increase the vertical vibration acceleration of the carbody at medium and high frequencies.The secondary suspension stiffness mainly affects the vertical vibration of the carbody at the bouncing frequency of the carbody.The carbody,bogie frame and unsprung mass have some influence on the carbody's bouncing motion,the first order bending of the floating plate and the peak vibration acceleration of the car-body at P2 resonance.
关键词
振动与波/钢弹簧浮置板轨道/车辆/系统参数/振动特性/模态分析/平稳性
Key words
vibration and wave/steel spring floating slab track/vehicles/system parameters/vibration characteristics/modal analysis/ride comfort
维普
万方数据