Journal
VEHICLE SYSTEM DYNAMICS
Volume 46, Issue 1-2, Pages 49-66Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00423110701590180
Keywords
wheel/rail contact; non-steady-state rolling contact; wheel/rail dynamics; short pitch rail corrugation; wavelength fixing mechanism
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J. J. Kalker has been the first to consider non-steady-state or transient contact mechanics. Based on Kalker the second author developed a linear contact model for the non-steady-state rolling contact of a wheel running over slightly corrugated rails. The theoretical investigations are concentrated on linear, non-steady-state contact mechanics superimposed to a nonlinear reference state. The reference state is given by the running behaviour of a wheelset due to traction, curving or hunting. For the linear, non-steady-state analysis Kalker's theory has to be modified to predict wear rates in dependency of the corrugation wavelengths. As a result corrugations are only amplified in the range between 2 and 10cm. Therefore, non-steady-state contact mechanics and wear are responsible for a wavelength fixing mechanism. Structural mechanics of the rail indicate that wavelength in this range is predominantly amplified.
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