Change search
CiteExportLink to record
Permanent link

Direct link
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
Verication of simulated wheel-rail forces with measured data
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Rail Vehicles.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The purpose of this thesis was to verify the simulated wheel-rail forces from the simulation soft-ware Simpack by comparing the results with on-track measurements. The report constitutes a literature study on wheel-rail contact modelling and techniques for measurements of track forces and track irregularities. Furthermore, it describes the verification procedure itself and how the model was set up, and subsequently presents the results from the actual comparisons. Three versions of Simpack have been compared that utilize different types of contact models. Investigations on alternative ways of filtering track irregularities were conducted, and how the simulated forces were influenced by using worn wheel and rail profiles was also studied.The method was to realistically model the track sections in nine test cases with varying curve radii, considering the nominal track geometry and track irregularities. A vehicle model for the Regina 250 train was used for the simulations, which were then compared with the correspond-ing on-track measurements. Time histories and frequency contents were compared.It was found that the simulated wheel-rail forces correspond well to the measurements, at least for frequencies up to 5-10 Hz, and that no considerable deviations could be found when comparing the contact models. However, the simulation times differed and the discrete contact model introduced in Simpack 9.8 was particularly time demanding.The results shows that it is beneficial to filter the track irregularities before conducting simula-tions, since it saves simulation time while retaining an adequate accuracy of the track forces.The use of worn wheel and rail profiles could in this report not be shown to have any ma-jor impact on the wheel-rail forces, which is in contradiction with the hypothesis. However, it should be noted that the scope for this part was narrow and it merits a more thorough investigation.

Place, publisher, year, edition, pages
2015. , 76 p.
Series
TRITA-AVE, ISSN 1651-7660 ; 2015:89
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-185262OAI: oai:DiVA.org:kth-185262DiVA: diva2:919807
Supervisors
Examiners
Available from: 2016-04-18 Created: 2016-04-15 Last updated: 2016-04-18Bibliographically approved

Open Access in DiVA

fulltext(6884 kB)105 downloads
File information
File name FULLTEXT01.pdfFile size 6884 kBChecksum SHA-512
8b7ded8c1b0b7fcd02fd946ed64023e1fc8d499d2c39ba4f883d431565bc4b9eaa234010a2bc7acd54a8d98fe606c619a94d7a699f822673e414fa866faf7c76
Type fulltextMimetype application/pdf

By organisation
Rail Vehicles
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 105 downloads
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: 79 hits
CiteExportLink to record
Permanent link

Direct link
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