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On estimating the risk of wheel damage for wagons with paper rolls considering various dynamic conditions
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Rail Vehicles.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Hector Rail AB is a Swedish line haul provider for the European Rail Transport Market. On one of their lines, Hector Rail transports large cylinder-shaped paper rolls of different sizes from Holmsund to Skövde, and compressed recycled paper back to Holmsund, with Y25 bogie wagons. The wheels of these wagons experience surface initiated rolling contact fatigue, RCF, which is increasing the maintenance cost. In a collaboration with KTH Royal Institute of Technology a study of the risk of developing RCF cracks when comparing different track qualities, load cases, speeds, curves and wheel-rail friction coefficients as well as the consideration of wear is carried out.

The difference in surface initiated RCF when applying the different input parameters is analysed. The location along the track where the wheels are likely to initiate RCF is calculated, as well as the location of RCF on the wheels. The model also provides the curve characteristics that are most likely to initiate RCF on the wheels. This tool can be used for optimising and further streamlining the operation for freight traffic on this (or any other) line with respect to wheel damages and planned maintenance.

Abstract [sv]

Hector Rail AB är en Svensk linje trafik leverantör for den Europeiska transportmarknaden på spår. På en av deras sträckor transporterar Hector Rail stora cylindriska pappersrullar i olika storlekar från Holmsund till Skövde, och sammanpressat återvunnet papper tillbaka till Holmsund, med Y25 bogie vagnar. Hjulen till dessa vagnar upplever kross på löpbanan, vilket ökar underhållskostnaderna. I ett sammarbete med KTH Kungliga Tekniska Högskolan görs en studie för risken att utveckla krossprickor vid jämförelse mellan olika spårkvalitéer, lastfall, hastigheter, kurvor och hjul-räl friktion. Hänsyn tas också till effekten av nedbrytningen av hjulen.

Skillnaden i kross i löpbanan vid ansättning av de olika indata parametrarna har analyserats. Positionen längs spåret där hjulen sannlolikt initierar kross har beräknats så väl som positionen av kross på hjulen. Modellen levererar även kurvfallen som högst troligen initierar kross på hjulen. Detta verktyg kan användas för att optimera och effektivisera verksamheten för godstrafik på detta (eller andra) spår med hänsyn till hjulskador och planerat underhåll.

Place, publisher, year, edition, pages
2016. , p. 36
Series
TRITA-AVE, ISSN 1651-7660 ; 2016:47
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-200712OAI: oai:DiVA.org:kth-200712DiVA, id: diva2:1070418
Examiners
Available from: 2017-02-01 Created: 2017-02-01Bibliographically approved

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CiteExportLink to record
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