Electrical behaviour of the wheel-rail contact

Houzé, Frédéric; Chollet, Hugues; Testé, Philippe; Lorang, Xavier; Loëte, F.; Andlauer, Richard; Debucquoi, S.; Lerdu, F.; Antoni, Marc

doi:10.1049/cp.2012.0624

Cited by 3 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resistance vs. force curves, plotted in log scale, show different patterns for loading and unloading: as force increases, resistance first decreases slightly, then more markedly; on return, resistance increases with an intermediate slope. We assume that this behavior, which is in most cases far from the Hertzian contact model, reflects the influence of the surface roughness remaining after polishing (measured peak-peak values of around 4 µm on the roller and 8 µm on the rail), with plastic deformation of asperities occurring between 200 and 300 N. With regard to current intensity, we compared non-oxidized and oxidized rail surfaces The high contact resistance and nonlinear behaviors of Figures 16 and 17 match the results previously observed in [10] with a 1 /4 down-scaled test bench and a train on a real line. Consequently, the designed bench can be considered representative of the phenomenon at full scale.…”

Section: Discussionsupporting

confidence: 75%

“…The phases of high-resistance transients could in real life give rise to deshunting occurrences. The high contact resistance and nonlinear behaviors of Figure 16 and Figure 17 match the results previously observed in [10] with a ¼ down-scaled test bench and a train on a real line. Consequently, the designed bench can be considered representative of the phenomenon at full scale.…”

Section: Measurements During Rolling Contact On Rusted Railsupporting

confidence: 83%

“…Additionally, Fukuda et al establish that several factors, including normal load, current intensity, oxide layer thickness and traffic frequency, can jointly influence the contact resistance [8]. A better understanding of wheel-rail electrical contact was also obtained through studies that were carried out on a 1 /4 -scale test rig and on-site using an instrumented regional train [9,10]. These studies highlighted the non-linear U − I characteristics, which are strongly dependent on the presence of oxide at the contact interface.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing Railway Network Safety by Reproducing Wheel–Rail Electrical Contact on a Laboratory Scale

Haydar,

Loete,

Houzé

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

Ensuring the safety of rail networks requires precise detection of a train’s position on a track section. This is achieved using a “track circuit” system, in which the wheel–rail electrical contact is the key to maintaining the system’s reliability. However, any degradation of this contact can lead to a track circuit malfunction known as “deshunting”, creating a serious safety risk for the rail network and for passengers. This paper presents a refined approach to this concern by implementing a laboratory-scale test bench. The main objective is to reproduce the wheel–rail electrical contact under controlled conditions to better understand the various aspects of this contact. The criteria governing the dimensioning of the test bench at reduced scale are based primarily on mechanical considerations. In this study, a series of tests were carried out to investigate the behavior of the electrical resistance as a function of various parameters such as load, current and time. An original homemade salt spray system was designed and used for obtaining controlled rail oxidation. Our preliminary results highlight the impact of these factors on the electrical resistance, providing valuable insights for future advances in rail safety technology.

show abstract

Section: Discussionsupporting

confidence: 75%

Section: Measurements During Rolling Contact On Rusted Railsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing Railway Network Safety by Reproducing Wheel–Rail Electrical Contact on a Laboratory Scale

Haydar,

Loete,

Houzé

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…This interface is not problematic in the case of electric current collection, but it becomes so in the case of train detection by the shunting method. Interface effects can highly increase resistance to become undetectable by sensors [13]. Several factors must be taken into account to characterize interface effect in current transmission at this rail/wheel interface.…”

Section: Wheel/rail Contactmentioning

confidence: 99%

Electrical capturing system for train supplying and involving parameters

Ahmed¹,

Gagou²,

Jonckheere³

et al. 2022

Mat & Dev

View full text Add to dashboard Cite

Electric trains are powered by a current distribution device which depends on several parameters. The research works presented in this paper are located upstream of two types of important applications in the railway field: the electrical supply of trains involving the sliding or stationary pantograph/catenary contact and the famous problem of shunting of trains involving the wheel/rail rolling contact. These cannot be assumed without energy loss. In the case of train navigation, electric current can be transmitted by spots established between sources and the carbon strip. The quality of the pantograph/catenary contact obeys very strict specifications to ensure its maintenance, for permanent current connection. However mechanical aging of the contact and/or infrastructures, alteration of electrical contacts due to electrical arcing, the wear of collection strips during sliding, aging of the materials, are limiting effect for current flow. In this paper we will explicitly describe all the elements necessary to supply trains with electric current.

show abstract

“…In 2012, measurements of the electrical behaviour of a wheel-rail contact were performed both on a 1:4-scale laboratory bench and on an instrumented car on a real track [19]. These measurements of contact current and voltage were made in view of a statistical approach that highlighted the typology of the I-V curves.…”

mentioning

confidence: 99%

Experimental Study and Phenomenological Laws of Some Nonlinear Behaviours of the Wheel–Rail Contact Associated with the Deshunting Phenomenon

Kaza,

Houzé,

Loëte

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

A widely used technique for locating the position of a train during its journey involves electrical detection: on a section of track, the train closes (“shunts”) a circuit dedicated to its location via its wheels and axles. The quality of the wheel–rail contact is therefore particularly important for signalling management and traffic control. In this paper, we show that the current flowing through the track circuit induces a permanent modification and a nonlinear, frequency-dependent behaviour of the electrical contact. We propose an analytical expression that describes the evolution of the measured voltage as a function of current and frequency for these nonlinear behaviours. This behavioural law was obtained using experimental measurements on a real train and could therefore be integrated into a global model describing the track system.

show abstract

Electrical behaviour of the wheel-rail contact

Cited by 3 publications

References 4 publications

Enhancing Railway Network Safety by Reproducing Wheel–Rail Electrical Contact on a Laboratory Scale

Enhancing Railway Network Safety by Reproducing Wheel–Rail Electrical Contact on a Laboratory Scale

Electrical capturing system for train supplying and involving parameters

Experimental Study and Phenomenological Laws of Some Nonlinear Behaviours of the Wheel–Rail Contact Associated with the Deshunting Phenomenon

Contact Info

Product

Resources

About