Abstract
Owing to increases in route traffic, axle load, and incompatible combinations of wheel-rail profiles in freight wagons, the Iran railway network has encountered a tremendous increase in localized wheel flange wear. Thus, a strategy was applied to select a new wheel profile to improve wheel-rail interaction and decrease overall localized wheel flange wear. In this research, a practical method was applied for an optimal selection of a wheel profile to minimize wheel wear for three types of freight bogies commonly employed for freight open wagons, including the three-piece 18100, Y25, and H665 series. The research procedure to select the final candidates was based on a wear behaviour study of verified bogie vehicles’ numerical models in operation, as equipped with various wheel profiles via conventional wheel-rail wear models. Then, comprehensive field tests were conducted to monitor the flange wear depth and total wear rate of the final wheel profile candidates in operation conditions, from the aspects of one and multiple wheel-rail contact point distribution, wear rate, and stability of the worn wheel profile for 56,500 km. Eventually, the optimal wheel profile was recommended, in consideration of the population of each bogie type. Some technical and field study aspects of the work were also discussed.
Published Version
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