On the Dynamics of a Railway Freight Wagon Wheelset with Dry Friction Damping
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We consider a simple model of a wheelset that supports one end of a railway freight wagon by springs with linear characteristics and dry friction dampers. We extend our earlier results to more realistic models, so in this presentation the linear kinematic contact relation in an earlier paper [True and Asmund, 2002] is replaced by the nonlinear rail/wheel contact geometry between a UIC60 rail and an S 1002 wheel profile. In addition we add a linear restoring force to control the yaw motion and finally add the axle side bearings to limit the maximum amplitude of the yaw oscillations. Stick-slip and hysteresis are included in our model of the dry friction.
The resulting dynamics is nonperiodic and most likely chaotic. A bifurcation diagram and some interesting types of apparently chaotic motion are presented and discussed.
Key wordsChaos nonlinear dynamics railway vehicle dynamics
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- W. Hanneforth and W. Fischer, Laufwerke, Transpress, Berlin, DDR, 1986.Google Scholar
- C. Knudsen, E. Slivsgaard, M. Rose, H. True and R. Feldberg “Dynamics of a model of a railway wheelset,” Nonlinear Dynamics, 6:215–236, 1994.Google Scholar
- Z.Y. Shen, J.K. Hedrick and J.A. Elkins, “A comparison of alternative creep-force models for rail vehicle dynamical analysis,” pages 591–605. Proc. 8th IAVSD Symposium on Vehicle System Dynamics, The Dynamics of Vehicles on Roads and Tracks, pp. 591–605, Swets & Zeitlinger, Lisse, 1984.Google Scholar