| 1. |
- Gullers, Per, et al.
(författare)
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High-frequency vertical wheel-rail contact forces – field measurements and influence of track irregularities
- 2008
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Ingår i: Wear. - 0043-1648. ; 265:9-10, s. 1472-1478
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Tidskriftsartikel (refereegranskat)abstract
- Field measurements of vertical wheel–rail contact forces in the frequency range 0–2000 Hz are reported. Instrumented wheels are employed together with a new method for signal processing including suppression of disturbing wheel resonances. Four different classes of rail irregularities are identified which all require consideration of high-frequency dynamics when evaluating wheel–rail contact forces. Ten stretches of Swedish track were selected for inspection and measurement of rail irregularities. The expected correlation between rail corrugation and measured dynamic forces is confirmed. It is found that high-frequency dynamics in the range 100–1250 Hz contributes significantly to contact forces which are important in the development of rolling contact fatigue. The present application is to high-speed trains on the Swedish track network with its mixed passenger and freight traffic. However, the method makes it possible to assess the level of high-frequency wheel–rail contact forces for all types of train traffic and could be used for a quantitative analysis of a complete railway network.
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| 2. |
- Gullers, Per, et al.
(författare)
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Track condition analyser – assessment of need for track maintenance based on instrumented wheelset measurements
- 2010
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Ingår i: Proceedings 16th International Wheelset Congress. ; , s. 12 pp-
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Konferensbidrag (refereegranskat)abstract
- Vertical wheel-rail contact forces with high magnitudes are generated in vehicle operation on track sections with periodic (rail corrugation) or discrete (rail joints, crossings) surface defects and/or in operations with out-of-round wheels. This may result in severe wheel damage, such as subsurface rolling contact fatigue and deep shelling. Based on input data in the form of contact forces measured by an instrumented wheelset, including contributions with frequencies up to about 2 kHz, Interfleet Technology Sweden has developed a Track Condition Analyser (TCA). The dominating and most frequently occurring types of track irregularity can be detected, their location along the line can be determined and their detrimental effect on the fatigue life of wheels can be estimated. This means that the TCA can be used as a tool for assessment of current track quality and to determine the need for immediate and planned track maintenance. Using the instrumented wheelset on a Swedish high-speed train, the 450 km line Stockholm-Gothenburg can be measured in both directions during an eight hour test campaign.
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| 3. |
- Gullers, Per, et al.
(författare)
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Track condition analyser: identification of rail rolling surface defects, likely to generate fatigue damage in wheels, using instrumented wheelset measurements
- 2011
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Ingår i: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. - 0954-4097 .- 2041-3017. ; 225:1, s. 1-13
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Tidskriftsartikel (refereegranskat)abstract
- Vertical wheel-rail contact forces with high magnitudes are generated in vehicle operation on track sections with periodic (rail corrugation) or discrete (rail joints, crossings) surface defects and/or in operations with out-of-round wheels. This may result in severe wheel damage, such as subsurface rolling contact fatigue and deep shelling. Based on input data in the form of contact forces measured by an instrumented wheelset, including contributions with frequencies up to about 2 kHz, a track condition analyser (TCA) has been developed. The dominating and most frequently occurring types of rail rolling surface defects can be detected, their location along the line can be determined, and their detrimental effect on the fatigue life of wheels can be estimated. This means that the TCA can be used as a tool to assess the current track quality and determine the need for immediate and planned track maintenance. Using the instrumented wheelset on a Swedish passenger train, the 450km line Stockholm-Gothenburg can be measured in both directions during an 8 h test campaign.
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