On the Influence Mechanism of the under Chassis Equipment Eccentric on the Vehicle Ride Quality of High-speed EMU Train

doi:10.3901/JME.2017.06.131

Abstract

Abstract:

A rigid-flexible coupling dynamic model of a high-speed EMU train which includes an elastic car body and a under chassis equipment is established, the optimal value of the natural frequency of the equipment is studied, and the effect and its mechanism of the eccentric of the equipment on the vehicle vibration performance are researched. Results show that the eccentric of the equipment may lead to a coupling vibration phenomenon of the six degrees of freedom, and each vibration mode shape and the relevant frequency change greatly and deviates from the original optimal value, resulting in a decrease in the effect of vibration reduction and the ride quality of the vehicle. Based on genetic algorithm, taking the decoupling degree as the optimization goal, the under chassis equipment natural frequencies as the constraints, the collaborative method for designing the three dimensional stiffness of the rubber components of the equipment suspension is proposed. Calculation results show that each rigid mode of the under chassis equipment can obtain a good decoupling degree, and the effect of the suspension on the vibration reduction is obvious and the vehicle ride quality can be improved effectively.

Key words: decoupling degree, energy distribution matrix, equipment eccentric, rubber component, high speed EMU train

XIA Zhanghui, GONG Dao, ZHOU Jinsong, SUN Wenjing, SUN Yu. On the Influence Mechanism of the under Chassis Equipment Eccentric on the Vehicle Ride Quality of High-speed EMU Train[J]. Journal of Mechanical Engineering, 2017, 53(6): 131-137.

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