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Received Sep 24, 2017; Accepted Dec 24, 2017
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1. Introduction
Nowadays more and more people consider high-speed trains to be a comfortable, safe, low, and clean energy consumption transportation tool. However, increasing the operation speed and mileage accelerated the polygonal wear of high-speed train wheels, which leads to the fierce vibration of the vehicle-track system in a wide frequency range. According to site tests and experiences of the authors, the high-order polygonal wear of wheel and the mid and high frequency vibrations of high-speed bogies are very notable [1]. These mid and high frequency vibration behavior existing in bogie frames have been considered to accelerate high-order polygonal wear of high-speed train wheels. To slow down the development of wheel polygon and offer a comfortable vibration environment for the high-speed train, it is necessary to investigate the dynamic characteristics of primary suspension and the structure parameters of bogie components on the vibration transmissibility of a high-speed bogie system. This study can provide a basis for high-speed vibration reduction in mid and high frequency.
The multibody modeling and dynamic behavior of the railway vehicles are well understood in the low frequency range, and the wheelset can be modeled well in the frequency range up to several thousand Hertz [2]. However, the work focused on middle and high frequency vibration of railway bogies and its influence on the system dynamics is relatively insufficient. Alexander et al. [3] established a FE model of the whole bogie, this model covers a high number of beams and bars, and most of the primary suspensions and secondary suspensions are simplified in this model. The model mainly serves as a support to investigate the actuator performance and evaluate several actuator concepts. Ren et al. [4] built a flexible vehicle system dynamics model based on multibody modeling and FE method, which was used to investigate the vibration and frequency transmission characteristics of the high-speed EMU. The vibration transference from axle box to car body was analyzed in detail.
In order to reduce the vibrations of the high-speed bogie in in mid and high frequency,...