Mechanism of novel phenomenon of rail corrugation on small radius curves with rail joint in mountainous city metros
Abstract
Purpose
The purpose of this study is to systematically investigate the novel phenomenon of rail corrugation on small radius curves with rail joints in mountainous city metros, characterized by the coexistence of short and long wavelengths (30–40 mm and 150–200 mm) on the low rail.
Design/methodology/approach
The finite element model of the wheel-rail system in the section with rail joint is constructed based on field surveys. The friction-coupled vibration characteristics of the wheel-rail system are studied from the perspective of friction self-excited vibration of the wheel-rail system and feedback vibration of the rail irregularity.
Findings
The rail corrugation with short wavelength is primarily induced by the friction self-excited vibration of wheel-rail system. In contrast, the rail corrugation with long wavelength is predominantly caused by the feedback vibration of rail joint irregularity. Additionally, the feedback vibration of corrugated irregularity accelerates the progression of corrugation depth without triggering the emergence of rail corrugation with new wavelength.
Originality/value
The research advances the understanding of the vibration inducement behind rail corrugation in mountainous city metros.
Keywords
Acknowledgements
The authors thank the financial support from the National Natural Science Foundation of China (52275176), Chongqing Municipal Basic research and Frontier Exploration Project (CSTB2022NSCQ-MSX1542), Chongqing Municipal Education Commission Science and Technology Research Project (KJZD-K202100703), The Research Innovation Foundation Designated for Graduate Students of Chongqing Jiaotong University (2024S0090 and 2024S0091) and International Science and Technology Innovation Cooperation Program of Sichuan Province (2023YFH0023).
Disclosure statement: The authors declare that they have no known competing financial interests or personal relationships.
Citation
Cui, X., Ge, Y., Xiao, Y., Zhang, H., Qi, Y., Ding, H., Guo, L. and Zhao, X. (2024), "Mechanism of novel phenomenon of rail corrugation on small radius curves with rail joint in mountainous city metros", Industrial Lubrication and Tribology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/ILT-07-2024-0245
Publisher
:Emerald Publishing Limited
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