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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 18

Effect of Rail Vibration Absorber on Track Dynamical Behavior under High-Speed Moving Wheel Load

Y. Zhao, X.B. Xiao, Z.F. Wen and X.S. Jin

State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China

Full Bibliographic Reference for this paper
Y. Zhao, X.B. Xiao, Z.F. Wen, X.S. Jin, "Effect of Rail Vibration Absorber on Track Dynamical Behavior under High-Speed Moving Wheel Load", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 18, 2014. doi:10.4203/ccp.104.18
Keywords: high-speed track, rail vibration, noise, wheel loading, vibration absorber.

Summary
A theoretical model of a wheel-track system considering the wheel, track and rail vibration absorbers is developed. This is used to predict the vertical dynamic behavior of the track for a high-speed moving wheel load subject to the excitation of wheel/rail surface roughness. Using a comparison of the PSD of the rail vertical displacement at the force point with and without the rail vibration absorbers, it is found that the absorber is effective in mitigating the force point responses of the rail subject to high-speed moving wheel load. However, the rail vibration absorber also makes the track system become more sensitive to the moving wheel load. Also the present parameter investigation of the rail vibration absorber shows that selecting suitable stiffness, mass and a damping loss factor for the absorber, a better performance is achieved in both rail vibration reduction and rail noise reduction.

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