INTERACTION BETWEEN FLEXIBLE WHEEL-SET AND CORRUGATED RAILS
Abstract
Railway track represents a periodic structure. In the presence of short-pitch rail corrugation, a wheel moving at high speed induces the vibrations whose frequency is greater than the frequency of the second symmetric flexural mode of a wheel-set. Therefore, the wheel-set cannot be regarded as a rigid body. In this study, the wheel-set is modeled by means of five lumped masses connected to a weightless flexible axle. These masses correspond to the boxes, to the wheels and to the wheel-set axle. Contact deformation due to a periodic contact force between the wheel and the rail causes an approach of the wheel centre to the rail centre-line. This approach is calculated by means of non-linear contact mechanics. The periodically varying curvature of the rail vertical profile causes periodic variation in the wheel-rail contact stiffness whose period equals the corrugation length. The above force is determined by means of Fourier series.
About the Author
P. M. Belotserkovskiy
Moscow State University of Railway Engineering (MIIT), Moscow
Russian Federation
Russian Federation
D.Sc. (Tech), professor of the department of higher mathematics
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For citations:
Belotserkovskiy P.M. INTERACTION BETWEEN FLEXIBLE WHEEL-SET AND CORRUGATED RAILS. World of Transport and Transportation. 2013;(2):6-17. (In Russ.)
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