Abstract
Polygonal wear is a common defect that appears along the railway wheel circumference, and a rapid propagation of which can come into being a considerable harm to the train operation quality, fatigue lifetime of components and environmental noise. On-board anti-slip controllers are commonly applied in electric locomotives aiming to avoiding the obvious slipping appearance of the powered wheelsets. This paper purposes to investigate the influence of anti-slip control threshold on wheel/rail interactions and polygonal wear evolution of locomotive wheels based on the train-track interaction and long-term polygonal wear evolution simulations. The simulation results indicate that the anti-slip control threshold and wheel/rail adhesion status greatly affect the wheel/rail tangential interactions. The dominating wheel polygonal wear with the 17–18 harmonic order propagates principally with an initial wheel defect. The anti-slip control threshold has an evident effect on the development of wheel polygonal wear. It further indicates that adopting the anti-slip controller with a lower threshold can availably restrain the propagation of polygonal wear of locomotive wheels, which is also confirmed by the practical applications.
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