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Influence of Bearing Flexibility in Rail Vehicle Dynamics
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Rail Vehicles. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0003-1583-4625
Department of Applied Mechanics, CEIT, Donostia-San Sebastián, Spain.
TECNUN, University of Navarra, Donostia-San Sebastián, Spain.
2015 (English)In: The international Journal of railway technology, ISSN 2049-5358, Vol. 4, no 1, 47-67 p.Article in journal (Refereed) Published
Abstract [en]

Dynamic multibody models for railway vehicles usually assume that the stiffness of the bearings is much higher than that of the primary suspension, neglecting their effect whatsoever. This assumption might not be entirely valid for high speed vehicles, where the primary suspension is stiffer than other rail vehicles; or for more complex systems such as variable gauge wheelsets, where the whole mechanic system might have a higher than expected flexibility. In this paper, a model to obtain the stiffness of a typical configuration of railway bearings is developed and applied to both a high speed vehicle bearing set and a variable gauge wheelset bearing set. The results show that the reduction of lateral stiffness as a result of bearing flexibility can reach up to 35% of its theoretical value. This massive reduction has a major influence on the prediction of the dynamic behaviour of these vehicles, e.g. critical speed or curving performance.

Place, publisher, year, edition, pages
Edinburgh: Civil-Comp Press , 2015. Vol. 4, no 1, 47-67 p.
Keyword [en]
roller bearing, bearing flexibility, railway dynamics, critical speed, variable gauge
National Category
Vehicle Engineering
Research subject
Järnvägsgruppen - Fordonsteknik
URN: urn:nbn:se:kth:diva-174107DOI: 10.4203/ijrt.4.1.3OAI: diva2:857933

QC 20151001

Available from: 2015-09-30 Created: 2015-09-30 Last updated: 2015-10-01Bibliographically approved

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Casanueva, Carlos
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