Investigation of the Top-of-Rail Friction by Field Measurements on Swedish Iron Ore Line

Projekt:

JVTC

Sammanfattning:
Friction management in the railway industry is a well-established technology with the aim of optimizing the friction between the wheel and rail. Determining the friction coefficient (μ) at the wheel-rail interface is therefore important especially for heavy haul lines with higher axle loads. This paper presents an initial study of the top-of-rail friction condition of a line with 30 ton axle load, the Iron Ore Line in the northern part of Sweden. The friction coefficient between the rail and the metal wheel of a portable tribometer was measured at different geographical locations and in different environmental conditions. The effects of precipitation are studied and compared with the effects of top-of-rail friction modifiers.
The measurements of non-lubricated line sections showed values of μ≈0.6, compared to μ≈0.3 for areas with, for example, top-of- rail lubrication. In snowy conditions a decrease in friction could also be detected.


Författare: Yonas Lemma ; Matthias Asplund ; Matti Rantatalo
Utgivare: International Journal of C O M A D E M
Utgivningsdatum: 2015-04
Diarienummer: TRV 2011/58769
ISSN: 1363-7681
Antal sidor: 4
Språk: Engelska
Kontaktperson: Per Olof Larsson Kråik, UHjbs