Quarterly Report of RTRI
Online ISSN : 1880-1765
Print ISSN : 0033-9008
ISSN-L : 0033-9008
PAPERS
Safety Assessment for Flange Climb Derailment of Trains Running at Low Speeds on Sharp Curves
Hiroaki ISHIDATakefumi MIYAMOTOEiichi MAEBASHIHisayo DOIKouhei IIDAAtsushi FURUKAWA
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2006 Volume 47 Issue 2 Pages 65-71

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Abstract

Flange climb derailment of railway vehicles occurs during low-speed running on sharply curved and twisted tracks. We studied the mechanism behind flange climbing to clarify and quantify the factors that cause derailment. In this study, passenger vehicle running tests were carried out on an RTRI test line subsidized by the Ministry of Land, Infrastructure and Transport. Derailment actually occurred during the tests, which measured wheel/rail contact forces, the forces exerted on the wheel sets and the dynamic behavior of the vehicle. Bench tests were also performed using roller rigs to investigate the characteristics of creep force. Based on the test results, this paper proposes a method to assess levels of safety against vehicle derailment on curved tracks.

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© 2006 by Railway Technical Research Institute
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