Cause of Rail Corrugation on Ladder Sleeper Track

SONG Qifeng; CHEN Guangxiong; DONG Bingjie; ZHANG Juncai; FENG Xiaohang

doi:10.3969/j.issn.0258-2724.20230573

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Journal of Southwest Jiaotong University > 2024 >

SONG Qifeng, CHEN Guangxiong, DONG Bingjie, ZHANG Juncai, FENG Xiaohang. Cause of Rail Corrugation on Ladder Sleeper Track[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230573

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SONG Qifeng, CHEN Guangxiong, DONG Bingjie, ZHANG Juncai, FENG Xiaohang. Cause of Rail Corrugation on Ladder Sleeper Track[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230573

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Cause of Rail Corrugation on Ladder Sleeper Track

doi: 10.3969/j.issn.0258-2724.20230573

School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 27 Oct 2023
Rev Recd Date: 29 Dec 2023

Available Online: 18 Jul 2024

Abstract

Abstract

To study the formation mechanism of inner rail corrugation on the ladder sleeper track in the small-radius curve, a finite element model of the leading wheelset–ladder sleeper track system was developed based on the theory that self-excited frictional vibration triggered by saturated wheel-rail creep force causes rail corrugation. In this model, solid elements were used to model the fastening system. Complex eigenvalue analysis and transient dynamic analysis were applied to solve the motion stability and dynamic time-domain response of the wheel-rail system, respectively. Furthermore, the effects of the parameters of the cushioning pad and ladder sleeper structure on the self-excited frictional vibration of the wheel-rail system were studied. The results show that the self-excited frictional vibration with a frequency of 150 Hz caused by the saturated wheel-rail creep force is the cause of inner rail corrugation on the ladder sleeper track in the small-radius curve section. The predicted corrugation wavelength is 69 mm, which agrees well with the measured wavelength. Parameter sensitivity analysis shows that increasing the damping of the lateral cushioning pad and laying ladder sleepers with a spacing of 1.25 m between lateral steel pipes can suppress rail corrugation on the ladder sleeper track to a certain extent.
- rail corrugation,
- ladder sleeper,
- self-excited frictional vibration,
- complex eigenvalue analysis

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