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- Karttunen, Kalle,1976Chalmers tekniska högskola,Chalmers University of Technology (author)
A numerical study of the influence of lateral geometry irregularities on mechanical deterioration of freight tracks
- Article/chapterEnglish2012
Publisher, publication year, extent ...
- 2012-04-23
- SAGE Publications,2012
Numbers
- LIBRIS-ID:oai:research.chalmers.se:cc4fa8cd-4d31-4844-b209-892281f29710
- https://doi.org/10.1177/0954409712445115DOI
- https://research.chalmers.se/publication/169566URI
Supplementary language notes
- Language:English
- Summary in:English
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Notes
- Optimisation of railway track maintenance requires knowledge of how a deteriorated track geometry will affect subsequent loading and damage of the track. This is the scope of the current study where, in particular, the influence on track shift forces and rolling contact fatigue is investigated through numerical simulations. To this end, track geometries are obtained from field measurements. Lateral irregularities are extracted and scaled to represent different levels of geometry deterioration. Multibody simulations of dynamic train-track interaction featuring two freight wagon types are performed under different operational conditions. Track shift forces and rolling contact fatigue damage are further evaluated from simulation results. It is found that track shift forces tend to follow a normal distribution for moderate levels of lateral track geometry irregularities, and that an approximate linear relationship between standard deviations of lateral irregularities and track shift forces can be established. The relation between lateral track irregularity magnitude and rolling contact fatigue is more complex. Increasing levels of lateral irregularities will decrease the fraction of curve length affected by rolling contact fatigue for sharp curves, whereas for shallow curves it increases. As detailed in the article, this is caused by the lateral movement of the contact point as imposed by the track irregularities. Furthermore, the influence of wheel/rail friction and wear is investigated.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Maskinteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering hsv//eng
- track irregularities
- track maintenance
- track shift force
- wear
- Track geometry
- prediction
- model
- multibody dynamic simulation
- rolling-contact fatigue
- rolling contact fatigue
Added entries (persons, corporate bodies, meetings, titles ...)
- Kabo, Elena,1972Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kabo (author)
- Ekberg, Anders,1967Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)anek (author)
- Chalmers tekniska högskola (creator_code:org_t)
Related titles
- In:Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit: SAGE Publications226:F6, s. 575-5860954-40972041-3017
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