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Evaluation of wheel profile measurements by means of the contact-point function for the wheel-rail interface
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics. (Drift och underhållsteknik)
2016 (English)Article in journal (Refereed) Submitted
Abstract [en]

This investigation has examined the accuracy of different measurement units belonging to the same wayside measurement system for train wheels by using data from a wheel profile measurement system (WPMS) in service. This was accomplished by the evaluation of data by using the contact-point function for the wheel-rail interface. The WPMS in question generates data on the wheel profiles of passing trains and is located on the Iron Ore Line in northernmost Sweden. These data are used for improving the wheel maintenance for the rolling stock operator, but there is some doubt concerning the data quality of the two different measurement units of the WPMS. Recent work shows that there are differences between the data from these units, but how this influences further use of the data has not been investigated so far. Accordingly, this article shows how two key wheel measures (the wheel flange thickness and the wheel profile) impact on the contact-point function and which of these measures has the largest impact on the contact-point function.  The results show that the different units produce different results and that these differences have a impact in the case of the wheel profile measure than in the case of the flange thickness measure. Furthermore, this investigation shows that the profile has a larger impact on the contact-point function than the flange thickness, and therefore this discrepancy needs to be taken into consideration. Finally, it is shown that mixing measurements from both units leads to contradictions.

Place, publisher, year, edition, pages
National Category
Infrastructure Engineering Other Civil Engineering
Research subject
Operation and Maintenance
URN: urn:nbn:se:ltu:diva-60150OAI: diva2:1044624
Swedish Transport Administration
Available from: 2016-11-04 Created: 2016-11-04 Last updated: 2016-11-21

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Asplund, Matthias
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