− The Dynamic Railway Diagnostics system (DRD) is a DSP-based measurement system, that analyses and stores the deformation signal of the rail caused by a passing train. The weight of the carriage is calculated by signal processing methods, by digital signal processors. This architecture makes the system capable of performing also other signal processing algorithms on this signal, e.g. faulty wh...

The focus of this study is the degradation of a near pearlitic microstructure under combined mechanical and thermal loadings leading to changes in mechanical properties. More specifically, it is examined how the orientation gradients inside the pearlite colonies, affect the spheroidisation. Samples were extracted from virgin near pearlitic railway wheels and prestrained, thereafter heat treated...

The benefits of substituting the conventional solid wheelset by independently rotating wheels (IRW) in actively steered trailed railway vehicles have already been presented in many works. If a traction system is included in this kind of vehicle it will interact strongly with the active steering system. This paper investigates how traction and active steering systems can be combined in an IRW bo...

Indian Rail transport is one of the major mode of transportation, so it must offer high comfort level for the passengers and the staff. However, the comfort that passengers experience is a highly complex and individual phenomenon. The improvement of passenger comfort while travelling has been the subject of intense interest for many train manufacturers, researchers and companies around the worl...

Abstract Railway wheels in service experience rolling contact fatigue loading, but also need to resist frictional heating on braking, yielding temperatures up 500 °C. The combination of mechanical and thermal loads leads changes the properties material. focus this study is investigate effect annealing local microstructure residual stresses railway wheel pearlitic steel (medium carbon steels, ~0...

Since 2012, European high speed railway networks are meant to have gone to market. Hence, several high speed trains, such as ICE, TGV, ETR 500, Sapsan..., are likely to run on the same tracks, whereas they have been originally designed for specific and different railway networks. Due to different mechanical properties and structures, the dynamic behaviors, the agressiveness of the vehicle on th...

in the last decade, decrease of the wear rate, increase in the axel load, and the velocity of the trains have changed the main damage mechanism of railway wheels from wear to rolling contact fatigue (rcf). rcf may lead to surface and subsurface cracks. the interaction between wear and rcf, removes the surface cracks, but the subsurface crack propagate gradually, and may lead to deeper and more ...