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Limit cycle behaviour and chaotic motions of two-axle freight wagons with friction damping
KTH, Superseded Departments, Vehicle Engineering.ORCID iD: 0000-0002-8237-5847
2002 (English)In: Multibody system dynamics, ISSN 1384-5640, E-ISSN 1573-272X, Vol. 8, no 3, 243-255 p.Article in journal (Refereed) Published
Abstract [en]

Simulation results for two-axle freight wagons were found to be extremely sensitive to minor changes of some input parameters. Therefore the influence of non-linearities in the model - especially friction damping - on the running behaviour of the wagon is investigated. After a description of the vehicle model and the basic running behaviour a brief introduction into differences between linear an non-linear systems is given. A typical bifurcation diagram for railway vehicle dynamics is presented. For different wheel-rail geometries limit cycle diagrams are calculated. Furthermore phase diagrams at different speeds are shown. Attractors with a broad band structure' which indicate chaotic behaviour can be observed. The chaotic content of the oscillations is, however, restricted to small changes of the amplitude of the limit cycles. The conclusion is therefore that the observed behaviour mentioned above is due to co-existing stable attractors rather than to chaotic behaviour.

Place, publisher, year, edition, pages
2002. Vol. 8, no 3, 243-255 p.
Keyword [en]
rail vehicle dynamics, friction damping, constrained multibody sytems, periodic motions, limit cycles, chaos, systems
URN: urn:nbn:se:kth:diva-22015ISI: 000179002800002OAI: diva2:340713
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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