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Simulation of dynamic interaction between train and railway turnout
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
Chalmers University of technology. (Charmec)
Chalmers University of technology. (Charmec)
2006 (English)In: Vehicle System Dynamics, ISSN 0042-3114, Vol. 44, no 3, 247-258 p.Article in journal (Refereed) Published
Abstract [en]

Dynamic train–track interaction is more complex in railway turnouts (switches and crossings) than that in ordinary tangent or curved tracks. Multiple contacts between wheel and rail are common, and severe impact loads with broad frequency contents are induced, when nominal wheel–rail contact conditions are disturbed because of the continuous variation in rail profiles and the discontinuities in the crossing panel. The absence of transition curves at the entry and exit of the turnout, and the cant deficiency, leads to large wheel–rail contact forces and passenger discomfort when the train is switching into the turnout track. Two alternative multibody system (MBS) models of dynamic interaction between train and a standard turnout design are developed. The first model is derived using a commercial MBS software. The second model is based on a multibody dynamics formulation, which may account for the structural flexibility of train and track components (based on finite element models and coordinate reduction methods). The variation in rail profile is accounted for by sampling the cross-section of each rail at several positions along the turnout. Contact between the back of the wheel flange and the check rail, when the wheelset is steered through the crossing, is considered. Good agreement in results from the two models is observed when the track model is taken as rigid.

Place, publisher, year, edition, pages
Taylor & Francis Group, 2006. Vol. 44, no 3, 247-258 p.
Keyword [en]
Dynamic train–turnout interaction; Switches and crossings; Wheel–rail contact geometry, Contact forces; Multibody dynamics
National Category
Applied Mechanics
Research subject
Järnvägsgruppen - Infrastruktur
URN: urn:nbn:se:kth:diva-76163DOI: 10.1080/00423110500233487ISI: 000234240400003OAI: diva2:490925
QC 20120208Available from: 2012-02-08 Created: 2012-02-06 Last updated: 2012-02-08Bibliographically approved

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Gebretsadik, Elias Kassa
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