Investigation of adhesion recovery phenomenon using a scaled roller-rig

Bosso, Nicola; Magelli, Matteo; Zampieri, Nicolò

doi:10.1080/00423114.2019.1677922

Cited by 23 publications

(18 citation statements)

References 33 publications

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“…More details about the results can be seen in Zhou et al [44]. Similar experimental phenomena are found in the work of Boiteux [76], Zhang et al [58], Voltr et al [67] and Bosso et al [77,78]. This phenomenon of increasing adhesion after saturation is indicated as adhesion recovery.…”

Section: Discussionsupporting

confidence: 74%

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A Review on the Application of Friction Models in Wheel-Rail Adhesion Calculation

Yuan

Tian

et al. 2021

Urban Rail Transit

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Friction is the bond linking the tangential and normal forces at the wheel-rail interface. Modeling friction is the precondition for the wheel-rail adhesion calculation. In this work, the critical role of friction in the calculation of wheel-rail adhesion is discussed. Four types of friction models (Coulomb model, linear model + Coulomb model, rational model and exponential model) which are commonly used for the calculation of wheel-rail adhesion are reviewed, in particular with regard to their structural characteristics and application state. The adhesion coefficients calculated from these four friction models using the Polach model are analyzed by comparison with the measured values. The rational model and the exponential model are more flexible for defining the falling friction, and the adhesion coefficient calculated by these two models is highly consistent with the measured one. Though the rational model and exponential model describe the falling friction well, the existing friction models are not applicable for calculating adhesion after considering more realistic factors, such as thermal effect, contaminants and so on. Developing a novel and practical friction model to accurately describe the wheel-rail friction behavior is still an essential but challenging and significant task. This review provides a reference for the selection of existing friction models and generates fresh insights into developing novel and practical friction models.

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Section: Discussionsupporting

confidence: 74%

“…This phenomenon of increasing adhesion after saturation is indicated as adhesion recovery. The thermal effect due to the wheel-rail frictional heat and cleaning effect are considered the main reasons for the adhesion recovery [67,77,78]. Up to now, there has been no definite theory regarding adhesion recovery.…”

Section: Discussionmentioning

confidence: 99%

A Review on the Application of Friction Models in Wheel-Rail Adhesion Calculation

Yuan

Tian

et al. 2021

Urban Rail Transit

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“…Ref. [201] presents an innovative multiaxle roller-rig to investigate the adhesion recovery phenomenon and the experimental results obtained on this test stand.…”

Section: Wheel Adhesion Recovery (Optimised Braking Control)mentioning

confidence: 99%

Challenges and progress in the understanding and modelling of the wheel–rail creep forces

Vollebregt¹,

Six

Polách³

2021

Vehicle System Dynamics

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This paper surveys advances in the understanding and modelling of wheel-rail creep forces. The main focus is placed on tribological aspects, for which significant progress was made in the past two decades. We emphasise the role played by the surface conditions, i.e. the presence of liquid and solid layers, surface roughness, and nearsurface plastic deformation. As these surface conditions may change over time, transient changes may be obtained in the creep force characteristic. This brings feedback into the picture, with consequences and opportunities for optimised adhesion recovery, traction control, and braking systems.

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“…1, is an evolution of the single axis roller-rig, already designed by the authors which was previously designed and used for the study of degraded adhesion phenomena [12], [13] and wear [14]. More recently the attention of the research group focused on the adhesion recovery phenomenon [15]. At first, the research team tried to study this phenomenon adopting a traditional single axis roller-rig [16], which is composed by a single wheelset suspended on a pair of rollers.…”

Section: Description Of the Multi-axle Roller-rigmentioning

confidence: 99%

Validation of a Brake Monitoring System Using a Multi-Axle Roller-Rig

Bosso

Magelli

Zampieri

2020

WIT Transactions on the Built Environment

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A widespread diffusion of monitoring systems is the key to improving safety and reliability of railway vehicles and to reducing maintenance costs by increasing the lifetime of structural and mechanical components. Several on-board devices have been conceived in recent years to detect faults on critical parts, by monitoring the real-time conditions of wheelsets, bearings, brakes, bogie, carbody, etc. These systems rely on powered sensor nodes, mounted on different parts of the vehicle, which acquire signals of interest and use proper algorithms to detect component faults or train derailments. Roller-rigs represent a good solution to develop and validate new monitoring devices with good repeatability of test conditions. The research group from Politecnico di Torino realized an innovative 1:5 scaled roller-rig, consisting of four wheelsets running on the same pair of rollers, originally used for investigations on wheel-rail adhesion. Then, minor changes were made to simulate and test a braking system monitoring device. Each wheelset is provided with a braking system, consisting of two brake discs and two brake callipers, while the rollers are powered using one AC brushless motor. A freight train pneumatic system is reproduced thanks to three electropneumatic regulators, which simulate the pressure in brake pipe, auxiliary reservoir and brake cylinder. The test bench and the motor drive are managed by an industrial PC using the software LabVIEW, allowing to perform braking operations of a real vehicle. Sensors are installed to measure wheelset speed, calliper temperature and pressures in the braking system. These signals are sent to an electronic control unit, which could be provided with a fault detection logic. The paper deals with the experimental setup of the bench and the preliminary results obtained by laboratory tests, which highlighted that the apparatus can be a reliable tool to develop new monitoring algorithms for train braking systems.

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Investigation of adhesion recovery phenomenon using a scaled roller-rig

Cited by 23 publications

References 33 publications

A Review on the Application of Friction Models in Wheel-Rail Adhesion Calculation

A Review on the Application of Friction Models in Wheel-Rail Adhesion Calculation

Challenges and progress in the understanding and modelling of the wheel–rail creep forces

Validation of a Brake Monitoring System Using a Multi-Axle Roller-Rig

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