Estimating the Damage of Railway Carriage Wheels Equipped with Disc Brakes
Authors
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Márton Krénusz
AffiliationDepartment of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
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Róbert Sándor Kovács
Affiliation
Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
Department of Theoretical Physics, Wigner Research Centre for Physics, H-1525 Budapest, P.O.B. 49, Hungary -
Miklós Krémer
Affiliation
Knorr-Bremse Rail Systems Budapest; Department of Railway Vehicles and Vehicle System Analysis, Faculty of Transportation Engineering and Vehicle Engineering, Budapest University of Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
Abstract
The aim of this paper is to estimate the damage of railway carriage wheels caused by lock-up braking. First, we investigate the typical characteristics of wheel-rail contact including the parameters of contact patch, longitudinal creep and coefficient of adhesion. Then we show the current requirements concerning the wheel-slide protection systems and determine the points which should be reviewed. To predict the effect of the sliding phenomenon, material properties are needed, as well. Afterwards, a simplified thermal simulation is built to estimate where martensite formation may occur.
Keywords:
railway, wheel-rail contact, lock-up braking, sliding, martensite formationCitation data from Crossref and Scopus
