Estimation of railway wheel running temperatures using a hybrid approach

摘要: Abstract Accurate prediction of railway wheel temperatures, for a given running and braking history, is crucial estimation service induced thermal stresses which can affect gauge fatigue crack growth, particularly in tread region. In this work, three step approach adopted estimating temperatures. Firstly, train model employing brake block friction, wheel–rail traction-slip, resistance characteristics are used to estimate heat generation rates at block–wheel interfaces. Next, two dimensional boundary element method, proposed partitioning the said interfaces as function type, geometry, properties. Lastly, finite method temperatures taking inputs from method. The methodology validated using on rim rim–disc interface, field trials locomotive fitted with cast-iron blocks. A good match between simulation trial results was obtained despite highly complex speed patterns encountered trial. For periodic no stopovers, lost rail, blocks, via radiation, convection seen be comparable one another. Enhanced convective cooling wheels use higher diffusivity blocks effective ways reducing resulting stresses.