Change in Surface Condition of Turned Wheel and Effectiveness of Lubrication against Flange Climb Derailment

Hisayo DOI; Takefumi MIYAMOTO; Junichi SUZUMURA; Junichi NAKAHASHI; Hua CHEN; Takumi BAN

doi:10.2219/rtriqr.53.70

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Change in Surface Condition of Turned Wheel and Effectiveness of Lubrication against Flange Climb Derailment

Hisayo DOI, Takefumi MIYAMOTO, Junichi SUZUMURA, Junichi NAKAHASHI, Hua CHEN, Takumi BAN

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Keywords: running safety, wheel turning, flange climb derailment, coefficient of friction, sharp curve, lubrication

JOURNAL FREE ACCESS

2012 Volume 53 Issue 2 Pages 70-76

DOI https://doi.org/10.2219/rtriqr.53.70

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Abstract

A number of flange climb derailments have occurred in sharp curves or curves with turnouts within relatively short accumulated running distances subsequent to wheel turning. This indicates that a change in the condition of the turned wheel surface might be a factor inducing flange climbing. Through several experiments and numerical simulations, the authors investigated the relationship between the running safety of a vehicle and its wheel surface condition especially in terms of wheel/rail friction. Furthermore, lubrication just after wheel turning was proposed as a countermeasure to flange climb derailments and its effectiveness and persistence were evaluated.

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