3710 のり上がり脱線の根絶を目指して第1報 : 車輪とレールとの接触面の状態変化が摩擦係数に及ぼす影響(摩耗・摩擦,SS8:境界領域研究,第18回交通・物流部門大会(TRANSLOG2009))

概要

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The JR East has experienced several wheel-climb derailments on the switch, which was provided on the steep curvature. On the investigations, the railway found that the almost of these derailments were caused by the EMUs that installed a newly lathed wheel. It is said that the high friction coefficient u is presumably observed on the newly lathed wheel treads, however, the relationship between u and the condition of the wheel tread has not maid clear yet. To investigate the details, the experimental EMUs installed with newly lathed wheels were repeatedly operated on the steep curvature switch. As the results, the authors found that the tread of the wheel was gradually roughened according to the increase of the running distance of the EMUs, and that the pre-wheel climbed derailment accompanied with fairly wheel climb-up phenomena was observed.
2009-12-02