- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | CUI Xiaolu, BAO Pengyu, CHEN Jiaxin, YANG Zongchao. Rail Friction Self-Excited Vibration in Braking Section of High-Speed Railway[J]. Journal of Southwest Jiaotong University, 2023, 58(1): 141-149. doi: 10.3969/j.issn.0258-2724.20210173
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This study investigates the typical rail corrugation phenomenon in the braking section of high-speed railways from the viewpoint that the self-excited vibration of wheel-rail friction induces rail corrugation. The corrugation characteristics of a braking section are first mastered and corresponding track irregularities are collected in a field investigation of the Wuhan Guangzhou high-speed railway. Then, from the viewpoint of the rail corrugation induced by the self-excited vibration of the wheel-rail friction, finite element models of the power/trailer wheelset-track-braking system of a high-speed train in the braking section are established. The friction self-excited vibration of the wheel-rail system of the power/trailer is analyzed using the complex eigenvalue method. The possibility of friction self-excited vibrations of the wheel-rail system of the power/trailer is compared under braking and non-braking conditions. The friction self-excited vibrations of the wheel-rail system of the power and trailer under braking conditions are then analyzed. Finally, the effects of the friction coefficient and fastener vertical stiffness on the friction self-excited vibration of the wheel-rail system are studied adopting the control variable method. The comparison between braking and non-braking conditions reveals that the braking condition is more likely to cause the friction self-excited vibrations of the system. Compared with the power/trailer wheel-rail system, the trailer wheel-rail system is more likely to cause the friction self-excited vibration of the system. It is concluded from parametric analysis that when the friction coefficient of the brake device is approximately 0.3 and the vertical stiffness of the fastener is approximately 50 MN·m−1, the possibility of the friction self-excited vibration of the wheel-rail system can be reduced to a certain extent, resulting in the suppression of rail corrugation.
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