Study on the adhesion behavior of wheel/rail under water conditions by using mixed lubrication model

Wang, Xiaopeng; Peng, Kun; Zhao, Mingwen; Tian, Hui; Qin, Hongling

doi:10.1108/ilt-08-2021-0337

Cited by 5 publications

(8 citation statements)

References 16 publications

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“…When the train runs on the wet track, the wheel–rail contact is in a mixed lubrication state where solid contact and fluid lubrication coexist due to the intervention of fluid (Wu et al , 2022). The mixed lubrication wheel–rail normal contact model was built upon the authors’ previous work in Yang et al (2023). For brevity, the equations of wheel–rail normal contact model are not provided in this paper.…”

Section: Numerical Model Of Wheel–rail Rolling Contact Under Wet Cond...mentioning

confidence: 99%

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Investigation of rail damage considering impact at a welded joint under wet condition

Wang,

Wu,

Huang

et al. 2023

ILT

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Purpose The purpose of this study is to develop a transient wheel–rail rolling contact model to primarily investigate the rail damage under wet condition when the train passes through the welded joints. Design/methodology/approach The impact force induced by welded joints is obtained through vehicle–track coupling dynamics. The normal and tangential wheel–rail contact pressures were solved by elastohydrodynamic lubrication (EHL) theory and simplified third-body layer theory, respectively. Then, the obtained tangential pressure and normal pressure were applied to the finite element model as moving loads, simulating cyclic loading. Finally, the shakedown map and critical plane method were used to predict rolling contact fatigue (RCF) and the initiation of fatigue cracks. Findings The results indicate that RCF will occur and fatigue cracks are more prone to appear on the subsurface of the rail, specifically around 2.7 mm below the rail surface in the vicinity of the welded joint and its heat-affected zone. Originality/value The cosimulation of numerical model and finite element model was implemented. The influence of surface roughness and fluids was considered. In this model, the normal and tangential wheel–rail contact pressure, the stress and strain and the rail fatigue cracks were obtained under a rail-welded joint excitation.

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Section: Numerical Model Of Wheel–rail Rolling Contact Under Wet Cond...mentioning

confidence: 99%

“…This paper assumes that the surface roughness of the wheel and rail surfaces follows a Gaussian distribution. The 3D morphology of random rough surfaces was generated using a two-dimensional digital filtering method with a root mean square σ = 0.42 μm (Yang et al , 2023), shown in Figure 5.…”

Section: Numerical Proceduresmentioning

confidence: 99%

Investigation of rail damage considering impact at a welded joint under wet condition

Wang,

Wu,

Huang

et al. 2023

ILT

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“…The Hertzian contact theory is the most widely used model in wheel/rail contact analysis (Sun et al , 2019a; Wang et al , 2022). With fast calculation speed and relatively good accuracy, it is applied in vehicle dynamics analysis.…”

Section: Introductionmentioning

confidence: 99%

Research on wheel wear of the light rail transit based on a modified semi-Hertzian contact model

Wang

Zhu

Zhang

et al. 2023

ILT

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Purpose While the normal wheel–rail contact model cannot be accurately used for light rail transit (LRT) wheel wear analysis with large wheelset lateral displacement and wheelset yaw angle, a modified semi-Hertzian contact model (MSHM) is proposed in the paper. Design/methodology/approach MSHM was first proposed to consider the wheelset motion with the lateral displacement and the yaw angle. Then, a dynamic model of an LRT was established and the influence of some key factors on wheel wear is analyzed. At last, after operating for a certain mileage, the predicted wheel wear is compared with the tested wheel wear. Findings Compared with the tested wheel wear, the predicted wheel wear shows a good agreement with the measured result, verifying the accuracy of MSHM. Originality/value Considering larger wheelset lateral displacement and yaw angle, MSHM can be used to calculate the wheel wear of the LRT with high accuracy.

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Section: Introductionmentioning

confidence: 99%

“…Furthermore, with the development of the deterministic model, it is available to accurately evaluate the wheel-rail adhesion characteristic. Wang (2022) proposed a wheel-rail mixed lubrication model to study the adhesion behavior of wheel-rail from boundary lubrication to mixed lubrication. To solve the mixed EHL problem, the typical approach is to use a unified equation system with appropriate unified numerical solution method for both lubricated areas and asperity contacts simultaneously (Hu and Zhu, 2000).…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Xiao

et al. 2023

ILT

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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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Study on the adhesion behavior of wheel/rail under water conditions by using mixed lubrication model

Cited by 5 publications

References 16 publications

Investigation of rail damage considering impact at a welded joint under wet condition

Investigation of rail damage considering impact at a welded joint under wet condition

Research on wheel wear of the light rail transit based on a modified semi-Hertzian contact model

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

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