Effects of Track Stiffness and Tuned Rail Damper on Rail Roughness Growth and Rail Vibration Levels on Metro System

Wang, A.; Wang, Z.; Zhao, Zhengwei; Zhang, Youshan; Duan, Yuanfeng; Tao, Lei; Du, Minggang

doi:10.1007/978-3-662-44832-8_79

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…In terms of the mitigation measures for short pitch rail corrugation, some studies reported that a tuned rail damper can be used to suppress the pinned-pinned resonance and thus the growth of the corresponding corrugation. [28][29][30] Improving the hardness and wear resistance of rail material is also effective to slow the growth of corrugation. 31 Some works tried to find a solution by investigating the influence on corrugation of the parameters of rail components, e.g.…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigation into the formation mechanism and mitigation measures of short pitch rail corrugation in resilient tracks of metros

Fang

Wang

Peng

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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Severe rail corrugation occurs at both the curved and tangent tracks of the metro in Shanghai, where resilient rail fasteners are used to reduce ground-borne vibration by isolating the transmission of track vibration to the infrastructure. The wavelength of corrugation is about 25-30 mm. It could be assumed that this short pitch rail corrugation is caused by the pinned-pinned resonance. However, rail fasteners with low stiffness were believed to be able to suppress the pinned-pinned resonance thereby resulting in corrugation. To investigate the formation mechanism of this specific rail corrugation, a multiple wheel-rail interaction model is used to calculate the wheel-rail dynamic forces caused due to the multiple wheel-rail interactions, which are considered to play a major role in the formation of corrugation. Then the influences on wear and corrugation growth are analyzed in terms of both amplitude and phase of the wheel-rail dynamic forces. By combining the properties of multiple wheel-rail interactions with their influences on wear and corrugation, the growth rates of rail corrugation at different wavelengths (frequencies) are studied to obtain the characteristic wavelength (frequency), at which the highest corrugation growth rate appears. The obtained characteristic wavelength is in good agreement with observation in the practice of Shanghai metro. It is found that the wave reflection from the wheels on the rail is responsible for the short pitch rail corrugation in the resilient tracks. Finally, tuned rail dampers are applied in the multiple wheel-rail interaction models to investigate their effects on rail corrugation growth. The simulation results show that use of tuned rail dampers is effective in suppressing the short pitch rail corrugation occurring at resilient tracks.

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Section: Introductionmentioning

confidence: 99%

Theoretical investigation into the formation mechanism and mitigation measures of short pitch rail corrugation in resilient tracks of metros

Fang

Wang

Peng

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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show abstract

“…In reality, some specific wheel-rail dynamics takes effect and leads to the development of the corresponding corrugation with the highest growth rate, while other corrugation is suppressed due to the low growth rate. In [42][43][44][45], it was found that the rail absorber could be applied to suppress the growth of rail corrugation due to the pinned-pinned resonance. In [46], the study showed that the growth of rail corrugation was slowed down with the help of the improvement of the material performance of rail.…”

Section: Literature Reviewmentioning

confidence: 99%

Applying System Dynamics of Discrete Supported Track to Analyze the Rail Corrugation Causation on Curved Urban Railway Tracks

Yin

Wei

Zheng

2021

Discrete Dynamics in Nature and Society

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Urban rail corrugation on curved tracks with small radii causes strong howling during operation, which has been bothering subway operating companies for many years. Therefore, revealing its causes and growth is important for the comfort and safety of subway operation. Current studies believe that the occurrence of rail corrugation is largely due to the resonant vibration of the wheel-rail system. However, little attention has been paid to the key causes of the track resonance and the practical prediction of the occurrence probability of rail corrugation on the certain track. This paper intends to solve these above issues. Firstly, the practical model of predicting the rail corrugation growth is proposed based on the wheel-rail coupling interaction, the key causes of corrugation are investigated, and the sensitivity analysis is carried out, while the corrugation superposition model is introduced to the analyze the corrugation evolution as well as to validate the corrugation growth from the aspect of material friction and wear. Secondly, the impact of the key causes on the initiation and development of the rail corrugation is investigated based on the cosimulation. Finally, case studies validate the proposed theory model and method. The results show that the practical prediction model for the rail corrugation growth proposed in this paper is able to estimate the occurrence possibility of rail corrugation on a specific track, and the superharmonic resonance of the track directly excited by passing vehicles eventually leads to rail corrugation. It is also found that shortwave corrugation develops more rapidly, and adjusting the support stiffness or sleeper spacing leads to fluctuations in the corrugation wavelength and its wear rate.

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“…The frequency corresponding to the short-pitch (25-80 mm) corrugation is mainly below 800 Hz, which is near the lateral pinned-pinned frequency of the rail. It can effectively describe the cause of short-pitch (25-80 mm) corrugation of the rail [25]. By reducing the wheel-rail dynamic flexibility difference and controlling the vibration of rail, we can effectively inhibit the formation and development of short-pitch corrugation of rail.…”

Section: The Mechanism Of Wheel-rail Dynamic Flexibility Differencementioning

confidence: 99%

Research on the Matching of Fastener Stiffness Based on Wheel-Rail Contact Mechanism for Prevention of Rail Corrugation

Zhao

Wang

Xing

2017

Mathematical Problems in Engineering

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Laying shock absorber fasteners is one of the effective countermeasures used to reduce the ground vibration induced from urban rail transit. However, this kind of fasteners could cause severe rail corrugation. Based on the “wheel-rail dynamic flexibility difference” mechanism, the optimization and further research of fastener stiffness were performed. With the finite element method, the simple beam and board model of the rail system is established to study the vertical and lateral dynamic flexibility characteristics of rails below 1,200 Hz. Within 5–40 kN/mm, a comparison is made between wheel-rail dynamic flexibility differences corresponding to the vertical stiffness and lateral stiffness of different fasteners. The results show that 20 kN/mm and 10 kN/mm are the least and most suitable vertical stiffness values of fasteners, respectively; 40 kN/mm and 5–10 kN/mm are, respectively, the least and most suitable lateral stiffness values of fasteners. The research and analysis results can be adopted as references for deciding the fastener stiffness of urban track.

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Effects of Track Stiffness and Tuned Rail Damper on Rail Roughness Growth and Rail Vibration Levels on Metro System

Cited by 7 publications

References 5 publications

Theoretical investigation into the formation mechanism and mitigation measures of short pitch rail corrugation in resilient tracks of metros

Theoretical investigation into the formation mechanism and mitigation measures of short pitch rail corrugation in resilient tracks of metros

Applying System Dynamics of Discrete Supported Track to Analyze the Rail Corrugation Causation on Curved Urban Railway Tracks

Research on the Matching of Fastener Stiffness Based on Wheel-Rail Contact Mechanism for Prevention of Rail Corrugation

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