Effect of damage on vehicle dynamics

Abstract: This chapter discusses the influence of different types of wheel-rail surface damage on rail vehicle dynamics. Changes in wheel–rail transversal profiles produced by regular wear mainly affect the critical speed and curving behaviour of the vehicle, whereas damage-induced alterations of the longitudinal rail profile (corrugation) and of the wheel circumferential profile (wheel out-of-roundness) are responsible for increased train–track interaction effects in the 20–5000 Hz frequency range, and cause increased emission of noise and vibration. Finally, the effect of localised defects on wheel and rail surfaces, caused e.g. by rolling contact fatigue, is examined.

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