Vibration Characteristics Analysis And Damping Matching Of Bogie Suspension System For High-speed-train

For the damping design of bogie suspension system of high-speed-train,there’s no reliable analytical design method at present,it mainly through computer technology,using the vehicle dynamics simulation software to determin the parameters.However,for complex vehicle models,it’s very difficult to establish the correct model,and the damping parameters are unknown at the beginning of a design project,thus,it is not conducive to the adjustment and optimization of damping parameters in the initial design stage of the bogie suspension system.Furthermore,it is difficult to meet the forward design requirements of the suspension system damping parameters.In this paper,using the theoretical analysis and computer simulation,some research was conducted,aiming at the problems,the innovations are as follows:(1)Through analysis of the typical track spectrum,using the curve fitting method,the track vertical profile irregularity model and lateral profile irregularity model can effectively reflect the actual track traffic conditions and meet the theoretical analysis of vehicle running safety and vehicle running stability were established.(2)According to the simplified vertical vibration model of high-speed-train,the sensitivity analyse was carried out to reveal the effects of the bogie vertical suspension system damping parameter on the train vertical vibration response,and taking minimum of the bogie RMS acceleration as target,using random vibration theory and complex function integral,the analytical damping design method of high-speed-train primary vertical suspension was built;taking minimum of the body vertical RMS acceleration and the axle box vertical RMS force as target,the analytical damping design method of high-speed-train secondary vertical suspension was built.(3)According to the simplified transverse vibration model of high-speed-train,the sensitivity analyse was carried out to reveal the effects of the secondary lateral suspension system damping parameter on the train lateral vibration response,and taking minimum of the body vertical RMS acceleration and the frame lateral RMS displacement as target,using random vibration theory and complex function integral,the analytical damping design method of high-speed-train secondary lateral suspension was built.(4)According to the 9 degree-of-freedom hunting motion vibration model of bogie,the sensitivity analyse was carried out to reveal the effects of the yaw damper damping on the bogie hunting motion vibration.Based on this,taking optimal running stability and curving performance as target,through theoretical derivation,using golden section principle,the analytical damping design method of yaw damper was built.Through simulation,the correctness of the analytical design method of the damping parameters of the suspension system was validated,the results show that the method established are correct.Through vehicle simulation experiment,the validity and reliability of the damping parameters of the high-speed-train suspension system designed were verified,the results show that the analytical damping matching design method of bogie suspension system established is reliable.This research provides an effective reference for the initial design of bogie suspension system damping parameters of high-speed-train,and also provides a good design value for the optimization design of the damping parameters of the high-speed-train suspension system.