Abstract
A new type of rail vibration damping device (NTRVDV), which is arranged between the bottom of the rail and track bed, is proposed in this paper. The finite element model of the rail system with the NTRVDV and tuned rail damper (TRD) was established, respectively. The impact load was applied to the finite element model, and comparison of the set of existing TRD and NTRVDV on the dynamic response of rail and rail vibration decay rate. The effect of the stiffness change of the elastic layer of the NTRVDV on the rail vibration was studied, and a hammering test verified the theoretical research results. The research results show that compared with the traditional TRD, the NTRVDV has a more obvious suppression effect on rail vibration acceleration. The rail vibration decay rate is significantly improved, especially in the low-frequency stage. With the increase of the stiffness of the elastic layer of the vibration suppression device, the vibration suppression effect of the NTRVDV on the rail is improved. The change of the elastic layer stiffness significantly impacts the rail’s vibration suppression effect in the range of 0–7 kN/mm.
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Financial support from the National Natural Science Foundation of China (No. 52162047), and the Science and Technology Planning Project of Lanzhou (2022-2-26) are gratefully acknowledged.
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Zhenxing He is the Director of the Institute of Rail Transit Vibration and Noise Control, Lanzhou Jiaotong University. His research direction is rail transit system dynamics and engineering application, research of rail transit vibration and noise reduction equipment and measures, evaluation of rail transit vibration and noise control measures, service inspection, performance upgrading, disease treatment research and consultation.
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He, Z., Zhang, X., Wang, X. et al. A new device for restraining rail vibration of ballastless track and its effect study. J Mech Sci Technol 37, 3919–3929 (2023). https://doi.org/10.1007/s12206-023-0708-y
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DOI: https://doi.org/10.1007/s12206-023-0708-y