Tread braking of railway wheels – temperatures generated by a metro train
Journal article, 2014

Tread braking of railway wheels results in the kinetic energy of the train being dissipated into the wheel and blocks in the form of heat. This heat is further conducted into adjacent structures, notably the cold rail, and also transferred into the surroundings by convection and radiation. Heat partitioning between wheel and block is, for short time periods, controlled by local thermal interactions at the contact point and by the conductive properties of the bodies. However, for a metro train that performs longer periods of intermittent braking (or for drag braking) convective and radiation cooling properties of the components come into play. In the present study, results from brake rig tests and from in-field testing of a metro train are presented and used to calibrate a simulation model. It is found that the cooling level of the wheels of the metro train is substantially lower than for the wheels of a freight wagon. Moreover, it is found that the first axle on the metro train is exposed to higher cooling levels than the remaining axles. In a numerical example, temperatures of tread braked wheels are calculated using the new findings for a metro train, and the results obtained are compared with wheel temperatures as calculated assuming freight wagon conditions.

rig and field experiments

finite element analysis

Railway tread braking

temperatures

frictional heating

calibration

wheel–rail contact

metro trains

Author

Shahab Teimourimanesh

Dynamics

Tore V Vernersson

Dynamics

Roger Lundén

Dynamics

Fredrik Blennow

Faiveley Transport

Markus Meinel

Faiveley Transport

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit

0954-4097 (ISSN)

Vol. 228 2 210-221

Areas of Advance

Transport

Subject Categories

Applied Mechanics

DOI

10.1177/0954409712470608

More information

Created

10/6/2017