Wheel-rail contact and friction models: A review of recent advances

Fang, Chong; Jaafar, Sulaiman A; Zhou, Wei; Yan, Hongkai; Meng, Xianghui

doi:10.1177/09544097231156730

Cited by 3 publications

(2 citation statements)

References 133 publications

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“…For rail vehicles, the destruction of the adhesion between the wheel and rail is the basic reason of wheel slip/idling [4]. One of the reasons for the traction and braking forces of wheelsets is the presence of contact and friction between the wheel and rail [5].…”

Section: Introductionmentioning

confidence: 99%

Reinforcement Learning Based Speed Control with Creep Rate Constraints for Autonomous Driving of Mining Electric Locomotives

Li,

Zhu,

2024

Applied Sciences

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The working environment of mining electric locomotives is wet and muddy coal mine roadway. Due to low friction between the wheel and rail and insufficient utilization of creep rate, there may be idling or slipping between the wheels and rails of mining electric locomotives. Therefore, it is necessary to control the creep rate within a reasonable range. In this paper, the autonomous control algorithm for mining electric locomotives based on improved ε-greedy is theoretically proven to be convergent and effective firstly. Secondly, after analyzing the contact state between the wheel and rail under wet and slippery road conditions, it is concluded that the value of creep rate is an important factor affecting the autonomous driving of mining electric locomotives. Therefore, the autonomous control method for mining electric locomotives based on creep control is proposed in this paper. Finally, the effectiveness of the proposed method is verified through simulation. The problem of wheel slipping and idling caused by insufficient friction of mining electric locomotives in coal mining environments is effectively suppressed. Autonomous operation of vehicles with optimal driving efficiency can be achieved through quantitative control and utilization of the creep rate between wheels and rails.

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Section: Introductionmentioning

confidence: 99%

Reinforcement Learning Based Speed Control with Creep Rate Constraints for Autonomous Driving of Mining Electric Locomotives

Li,

Zhu,

2024

Applied Sciences

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“…Moreover, severe wear easily leads the rail into a rolling contact fatigue zone, which further aggravates the wheel-rail response and poses a potential threat to the vehicle operational safety (Silva et al , 2023). In addition, the railroad system is in the open line environment, wheel-rail contact will inevitably be affected by the pollution of the third medium and the weather conditions (Khan et al , 2022; Ma et al , 2021; Fang et al , 2023). Therefore, the friction coefficient is often in a non-stationary state.…”

Section: Introductionmentioning

confidence: 99%

Influence of wheel profile wear coupled with friction coefficient on the dynamic response of subway vehicles

2023

ILT

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Purpose The purpose of this study is to match appropriate friction coefficients for subway operational vehicles, considering the dynamic variations of wheel profile wear. Design/methodology/approach This study combines experimental testing and numerical simulation to investigate the influence of wheel profile wear coupled with the friction coefficient on the vehicle dynamic response. Findings For the test route in this paper, it is recommended to control the friction coefficient on straight sections between 0.25 and 0.3, and on curved sections between 0.2 and 0.3. This satisfies the required adhesion coefficient for normal train traction and braking, while also ensuring the straight running performance and curve negotiation performance of the vehicle. Practical implications Reasonable friction coefficient ranges are proposed for straight and curved track lines to improve the operational safety and economy of the vehicles. Moreover, this study can provide a theoretical basis and reference direction for developing anti-wear measures for rail vehicles operating on fixed routes. Originality/value Considering the wear characteristics of operating vehicles and the dynamic changes in the wear profile, this paper explores the adaptability of different degrees of wheel wear profiles to different friction coefficients. Based on the response characteristics of vehicle dynamics, reasonable lubrication recommendations are proposed for this operating vehicle.

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Research on stress through photoelastic experiment and finite element method considering sliding wear

Yang,

Wei,

Han

et al. 2024

J. meas. eng.

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Sliding contact on the contact interface of friction pairs is a common type of contact. The sliding wear caused by sliding contact has an obvious influence on the stress in the contact area. In this study, the photoelastic experiment and finite element method are adopted to study variation laws of stress in the contact area. The results show that the stress in the contact region is very concentrated, and the contact half-width gradually ascends with the increase of sliding wear. The stress intensity in the contact region and von Mises stress at the contact centre decrease with the increase of wear depth. In the case of a wear depth of less than 0.3 mm, the stress intensity and the contact stress decrease rapidly with the growth of wear depth. When the wear depth exceeds 0.3 mm, the influence of wear depth on the stress intensity and contact stress is small. The results of this research clarify the effect of sliding wear on the stress in the contact area, and provide a reference for studying the contact issues.

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Wheel-rail contact and friction models: A review of recent advances

Cited by 3 publications

References 133 publications

Reinforcement Learning Based Speed Control with Creep Rate Constraints for Autonomous Driving of Mining Electric Locomotives

Reinforcement Learning Based Speed Control with Creep Rate Constraints for Autonomous Driving of Mining Electric Locomotives

Influence of wheel profile wear coupled with friction coefficient on the dynamic response of subway vehicles

Research on stress through photoelastic experiment and finite element method considering sliding wear

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