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Dynamic train/track interaction including model for track settlement evolvement
Linköping University, Department of Mechanical Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
Linköping University, Department of Mechanical Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
2004 (English)In: Vehicle System Dynamics, ISSN 0042-3114, E-ISSN 1744-5159, Vol. 41 (Supplement), 667-676 p.Article in journal (Other academic) Published
Abstract [en]

A ballasted railway track exposed to train traffic will degenerate. Track alignment and track level will deteriorate. Settlements of the track (loss of track level and alignment) require maintenance; the track is lifted and aligned, and new ballast material is injected under the sleepers. This paper presents a computer model by which the dynamic train/track interaction can be simulated and the permanent deformation of the track (i.e. track settlements) can be calculated. The voided sleepers ("hanging" sleepers) phenomenon will also be discussed.

Place, publisher, year, edition, pages
2004. Vol. 41 (Supplement), 667-676 p.
Keyword [en]
track settlement, train/track interaction, railway ballast, numerical model
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-100390OAI: oai:DiVA.org:liu-100390DiVA: diva2:661858
Available from: 2013-11-05 Created: 2013-11-05 Last updated: 2017-12-06
In thesis
1. Dynamic train/track interaction: hanging sleepers, track stiffness variations and track settlement
Open this publication in new window or tab >>Dynamic train/track interaction: hanging sleepers, track stiffness variations and track settlement
2005 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Trains have been operating on ballasted tracks for over 150 years. During this time demands from the railway organisations and from the industry to increase axle loads and train speeds on the existing railway lines have increased. The reasons for this are both economial and environmental.

Both higher axle loads and train speeds will increase the deterioration rate of the track and cause permanent settlements in the ballast and the underlaying soil. When the track quality decreases beyond certain limits maintenance for relevelling and realignment of the track is necessary, and this is expensive.

The aim of the work presented in this thesis, and of the work performed within the EU project SUstained PErformance of Railway TRACK (SUPERTRACK), is to investigate the dynamic train/track interaction and its effect on track degradation. Less degradation will reduce the maintenance costs regarding track settlement.

The work presented in this thesis focuses on different factors affecting the differential track settlement. By using the finite element method, the dynamic behaviour of a railway track subjected to a moving load has been studied. Dynamic effects of unsupported sleepers and their effect on track settlement have been investigated. Also track stiffness irregularities along the track have been studied, and an optimazation of the track stiffness at a transition zone has been performed.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2005. 25 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1159
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-24085 (URN)3649 (Local ID)91-8529-935-9 (ISBN)3649 (Archive number)3649 (OAI)
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2013-11-05

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Lundqvist, AndreasDahlberg, Tore

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