Change search

Cite
Citation style
• apa
• harvard1
• ieee
• modern-language-association-8th-edition
• vancouver
• Other style
More styles
Language
• de-DE
• en-GB
• en-US
• fi-FI
• nn-NO
• nn-NB
• sv-SE
• Other locale
More languages
Output format
• html
• text
• asciidoc
• rtf
On validation of a wheel-rail wear prediction code
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Rail Vehicles.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

During the past years, several tools have been developed to try predicting wheel and rail

wear of railway vehicles in an e-cient way. In this MSc thesis a new wear prediction

tool developed by I.Persson is studied and compared with another wear prediction tool,

developed by T.Jendel, which has been already validated and is in use since several years

ago. The advantages that the new model gives are simpler structure, the consideration of

wear as a continuous variable and that all the code is integrated in the same software.

The two models have the same methodology until the part of the wear calculations

and the post-processing. Wheel-rail geometry functions and time domain simulations are

performed with the software GENSYS.

In the simulation model the track and the vehicle are dened as well as other important

properties such as vehicle speed and coe-cient of friction. Three simple tracks are used:

tangent track, R=500 m curve with a cant of ht=0.15 m on the outer rail and R=1000 m

curve with a cant of ht=0.1 m on the outer rail. The model is assumed to be symmetric so

just outer (first and fourth axle) and inner (second and third axles) wheels are considered.

During the vehicle-track interaction, the normal and tangential problems are solved.

The wheel-rail contact is modelled according to Hertz's theory and Kalker's simplied

theory with the help of the algorithm FASTSIM. Then wear calculations are performed

according to Archard's wear law. It is applied in dierent ways, obtaining wear depth

directly in Jendel's and wear volume rate in Persson's model.

Jendel's model is rstly analyzed. Its specifc methodology is briefly explained and

modications are performed on the code to make it work as similar as possible to Persson's

model. Also parameters regarding the distance in which wear calculations are taken, the

discretization of the width of the wheel and the discretization of the contact patch are

analyzed.

The methodology of Persson's model is also studied, most of all the performance of the

post-processing which is one of the keys to the code. The parameters analyzed in this code

are the ones regarding a statistical analysis performed during the post-processing and the

discretization of the contact patch.

Finally the comparisons between the wear depth obtained for both models are carried

out. The discrepancies between the models are explained with the parameters analyzed

and the dynamic behaviour of both models. Also a theoretical case is used as reference for

comparison.

2013. , p. 91
Series
Trita-AVE, ISSN 1651-7660 ; 2013:41
Keyword [en]
wear, code validation, GENSYS
National Category
Vehicle Engineering
Identifiers
ISRN: KTH/AVE/RTM/-13/41OAI: oai:DiVA.org:kth-134706DiVA, id: diva2:667759
Subject / course
Railway Technology
Educational program
Master of Science - Vehicle Engineering
Presentation
2013-05-28, Vehicle Engineering Laboratory (VEL), Teknikringen 8, ground floor, Stockholm, 10:00 (English)
Examiners
Available from: 2013-12-06 Created: 2013-11-27 Last updated: 2013-12-06Bibliographically approved

Open Access in DiVA

File information
File name FULLTEXT01.pdfFile size 1526 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

Rail Vehicles
On the subject
Vehicle Engineering

Search outside of DiVA

The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available
urn-nbn

Altmetric score

urn-nbn
Total: 272 hits

Cite
Citation style
• apa
• harvard1
• ieee
• modern-language-association-8th-edition
• vancouver
• Other style
More styles
Language
• de-DE
• en-GB
• en-US
• fi-FI
• nn-NO
• nn-NB
• sv-SE
• Other locale
More languages
Output format
• html
• text
• asciidoc
• rtf
v. 2.33.0
| | | |