Railway track stiffness variation - consequences and countermeasures
2005 (English)In: 19th IAVSD Symposium of Dynamics of Vehicles on Roads and Tracks, 2005, Milano: Dept Mech Eng, Politecnico di Milano , 2005Conference paper (Other academic)
The track stiffness experienced by a train will vary along the track. Sometimes the stiffness variation can be very large whitin short distances. These changes in track stiffness will cause variations in the train/track interaction forces, and force variations will normaly imply settlements of the track as a result of permanent deformation in the ballast and in the underlying structure.
Since the behaviour of the ballast and subground material is not exactly the same under all sleepers. and since the loading of the track is irregular. the amount of settlement will differ from one sleeper to another. As soon as the track geometry starts to deteriorate, the variations of the train/track interaction force increase, and this speeds up the track deterioration rate.
This paper discusses how the transition zone between two track stiffnesses should be designed to reduce the track settlement. The transition from one track stiffness to another is optimized to obtain a wheel/rail contact force with as small variations as possible. A smooth wheel/rail contact force at the transition area will minimize the track settlement.
Place, publisher, year, edition, pages
Milano: Dept Mech Eng, Politecnico di Milano , 2005.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-41855Local ID: 59253OAI: oai:DiVA.org:liu-41855DiVA: diva2:262710
19th IAVSD Symposium of Dynamics of Vehicles on Roads and Tracks, Milano, August 29-Seprember 2, 2005