Comparison of wheel/rail dynamic responses of the rail weld zones between bal-‎lasted track and slab track in high-speed railways

Yichang Zhou, Kaiyun Wang, Kaikai Lv

Abstract


Both ballasted track and slab track are commonly used in high-speed railways. Based on the theory of vehicle-track coupled dynamics, the wheel-rail dynamic responses in the rail weld zones of these two tracks are investigated, and the P1, transient high-frequency impact force, and the P2, low-frequency impact force are analysed. The results show that, due to the high stiffness and small damping ratio of the vehicle and the ballasted track system, the P1 force of the ballasted track is generally greater than that of slab track while the P2 force is smaller than slab track. Furthermore, the duration of the impact load of ballasted track is longer than that of slab track. The results will provide a reference for the analysis and evaluation of ballasted tracks in high-speed railways.


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References


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