Measurements of track stiffness and track irregularities todetect short waved support conditions
2006 (English)In: International Conference on Railway Track Foundatons, 2006Conference paper (Refereed)
Short waved vertical irregularities of the track can cause high dynamic train-track interactionforces. These forces cause several problems, for example deterioration of track geometry anddamage of components. Since these short irregularities also could be an important source ofpropagating waves and environmental vibration, different measurement and evaluation techniques have been investigated to detect and quantify these irregularities. The RMSV(Rolling Stiffness Measurement Vehicle) developed by Banverket has been used to verify thephenomenon of track stiffness variability. Variations of 5 – 20 kN/mm (2 – 10 %) betweenadjacent sleepers are common, and variations even up to 60 kN/mm (30%) have been detectedon a modern ballasted track. Also a new way of analysing longitudinal level, measured with atrack recording car (TRC), by filtering out only short waved irregularities makes it possible toindicate problems with hanging sleepers, variable sleeper support and other possible shortwaved irregularities. Even though the amplitude of these irregularities is low (around 0.5 – 1mm), their impact can be considerable.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-10352OAI: oai:DiVA.org:kth-10352DiVA: diva2:216192
QC 201006232009-05-072009-05-072010-07-20Bibliographically approved