Influence of Hydraulic Shock Absorber Characteristic Parameters on the Critical Speed of High-speed Trains

doi:10.3901/JME.2017.06.138

Abstract

Abstract:

In order to obtain the influence of hydraulic shock absorber characteristic parameters on the critical speed and wheel-rail wear of high-speed train, take CRH380B as an example, a vehicle dynamics model is established using SIMPACK soft-ware based on the vehicle dynamics theory．Select the rubber joint stiffness, damping characteristics of secondary lateral shock absorber and yaw shock absorber to research. The results showed that: rubber joint stiffness of yaw shock absorber optimal ranges is 10-12 MN/m. When the stiffness is less than this value, the critical speed decreased significantly, the wheel-rail wear slowly increase. When stiffness is greater than this value, the critical speed slow down, but a sharp increase in wheel-rail wear. rubber joint stiffness of secondary lateral shock absorber have little effect on the critical speed and wheel-rail wear, optimal value is 4.25 MN/m. The damping characteristics of yaw shock absorber and secondary lateral shock absorber have some influence on the critical speed and wheel-rail wear.

Key words: critical speed, high-speed trains, wheel-rail wear, characteristic parameters of hydraulic shock absorber

QIN Zhen, ZHOU Suxia, SUN Chenlong, CHEN Jinxiang, LONG Wenbo, ZHANG Xiaojun, WANG Chengguo, LUO Jinliang. Influence of Hydraulic Shock Absorber Characteristic Parameters on the Critical Speed of High-speed Trains[J]. Journal of Mechanical Engineering, 2017, 53(6): 138-144.

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