Numerical study of wheel/rail dynamic interactions for high-speed rail vehicles under low adhesion conditions during traction

Wu, Bing; Xiao, Guangwen; An, Boyang; Wu, Tao; Shen, Quan

doi:10.1016/j.engfailanal.2022.106266

Cited by 27 publications

(12 citation statements)

References 37 publications

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“…In earlier research, the effects of contaminants are considered by evaluating their friction coefficients from laboratory tests and importing them into the wheel-rail dry contact models. [120][121][122] However, this method can't handle the effects of liquid contaminants properly due to the mixed lubrication behavior at the interface. The contact area of two bodies with interfacial fluid can be separated into partly contact of asperities and partly into areas where the fluid is separating both surfaces as shown in Figure 6.…”

Section: Wheel-rail Adhesion Modelsmentioning

confidence: 99%

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

Fang

Jaafar

Zhou

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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Rail transportation is regarded as a reliable, quick, and secure mode of transportation. The wheel-rail contact interaction is crucial to the railway operation since it is responsible for supporting, traction, braking, and steering of railway vehicles. Improper wheel-rail interactions may produce or exacerbate wheel-rail interface issues such as rolling contact fatigue (RCF) and wear, which can threaten the vehicle’s running safety and stability. A review of the evolution and recent literature on wheel-rail contact mechanics and tribology is presented here. Topics covered include the basics of wheel-rail contact problem and methodologies for modeling both the normal contact (Hertzian and non-Hertzian) and tangential contact (Kalker’s theories including CONTACT and FASTSIM algorithms, Polach’s theory, USETAB program, etc.). The paper also reviewed various effects of contaminants and environmental conditions (water, leaves, sand, temperature, humidity, etc.) in wheel-rail contact. Various wheel-rail empirical adhesion models like the Water-induced low adhesion creep force model (WILAC) model and adhesion models based on elastohydrodynamic lubrication (EHL) theory (Greenwood-Tripp [GT] and Greenwood-Williamson [GW] models) are also reviewed. Lastly, the paper discusses the need and challenges for developing and integrating the wheel-rail non-Hertz contact model and adhesion model, as well as open areas for further research.

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Section: Wheel-rail Adhesion Modelsmentioning

confidence: 99%

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

Fang

Jaafar

Zhou

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…The high-speed maglev speed can reach 600km/h, which is an important development direction of higher speed rail transit in the future (Wu, Xiao, An, Wu, & Shen, 2022; Lee, Kim, & Lee, 2006). As a disruptive technology, high-speed maglev railway will have the main characteristics of disruptive technology, which will bring certain challenges to the development of traditional transportation modes, form a new market pattern, improve the economic benefits of the railway itself and have an important impact on economic and social development.…”

Section: The Significance Of High-speed Maglev Technology Developmentmentioning

confidence: 99%

Current status and reflection on the development of high-speed maglev transportation

Li,

Shi,

et al. 2023

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PurposeHigh-speed maglev technology can address the issues of adhesion, friction, vibration and high-speed current collection in traditional wheel-rail systems, making it an important direction for the future development of high-speed rail technology.Design/methodology/approachThis paper elaborates on the demand and significance of developing high-speed maglev technology worldwide and examines the current status and technological maturity of several major high-speed maglev systems globally.FindingsThis paper summarizes the challenges in the development of high-speed maglev railways in China. Based on this analysis, it puts forward considerations for future research on high-speed maglev railways.Originality/valueThis paper describes the development status and technical maturity of several major high-speed maglev systems in the world for the first time, summarizes the existing problems in the development of China's high-speed maglev railway and on this basis, puts forward the thinking of the next research of China's high-speed maglev railway.

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“…Moreover, the stochastic model was successfully extended to study wheel-rail adhesion under interfacial contaminations (Wu et al , 2014; Wu et al , 2016; Wu et al , 2017). Later on, the wheel-rail dynamic interactions for high-speed rail vehicles under low adhesion conditions during traction (Wu et al , 2022) were also studied. However, the stochastic model tackled the problem from the macro-scale perspective and neglected the local detailed information about asperities contact which may be correlated to wheel and rail wear and rolling contact fatigue.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on wheel-rail adhesion under water-lubricated condition during braking

Yang

Xiao

et al. 2023

ILT

Self Cite

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Purpose The purpose of this study is to develop a 3D wheel-rail adhesion model under wet condition, which considers the generated surface roughness topography and the traditional braking procedure for high-speed trains. Design/methodology/approach Wheel-rail adhesion has an important effect on the braking ability of railway vehicle. Based on the deterministic mixed lubrication approach, the model was solved to get the adhesion characteristics of the train during braking. The elastic deformation was calculated with the discrete convolution and fast Fourier transform method. The simulation results of adhesion coefficient were compared with the experimental values. The wheel-rail adhesion characteristics of train braking at several different initial speeds were investigated. The effects of the time-step length and roughness orientation on the contact load ratio were also discussed. Findings The results show that the adhesion coefficient of the numerical model is in good agreement with the experimental results. At the instant of braking, the adhesion coefficient drops to a lower adhesion level, the value of adhesion coefficient is lower than 0.06, especially at a higher speed (200, 300 and 400 km/h). Originality/value It can provide a better understanding of the low adhesion phenomenon of train braking under wet condition. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2023-0040/

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Numerical study of wheel/rail dynamic interactions for high-speed rail vehicles under low adhesion conditions during traction

Cited by 27 publications

References 37 publications

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

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

Current status and reflection on the development of high-speed maglev transportation

Numerical investigation on wheel-rail adhesion under water-lubricated condition during braking

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