Abstract
According to a large amount of the test data, the mid and high frequency vibrations of high‐speed bogies are very notable, especially in the 565~616 Hz range, which are just the passing frequencies corresponding to the 22nd to 24th polygonal wear of the wheel. In order to investigate the main cause of wheel higher‐order polygon formation, a 3D flexible model of a Chinese high‐speed train bogie is developed using the explicit finite element method. The results show that the couple vibration of bogie and wheelset may lead to the high‐order wears of wheel. In order to reduce the coupled resonance of the wheelset and the bogie frame, the effects of the stiffness and damping of the primary suspensions, wheelset axle radius, and bogie frame strength on the vibration transmissibility are discussed carefully. The numerical results show that the resonance peaks in high frequency range can be reduced by reducing the stiffness of axle box rotary arm joint, reducing the wheelset axle radius or strengthening the bogie frame location. The related results may provide a reference for structure improvement of the existing bogies and structure design of the new high‐speed bogies.
Highlights
Nowadays more and more people consider high-speed trains to be a comfortable, safe, low, and clean energy consumption transportation tool
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
Vibrations of the axle box and the bogie frame obtained by simulation are in good agreement with the measured results
Summary
Nowadays more and more people consider high-speed trains to be a comfortable, safe, low, and clean energy consumption transportation tool. 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]. 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. 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 reasons which cause the high-order wear of wheel are analyzed, and the effects of the parameters of the primary suspensions, wheelset axle radius, and stiffened thin plates in bogie frame on the vibration transmissibility are discussed carefully. It is noted that the numerical methods and the results would be helpful in understanding the mid and high frequency vibration characteristics and the vibration transmissibility of the high-speed train bogie
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