スラック拡大による鉄道車両の走行性向上効果に関する検討 : 都市鉄道向け車輪踏面における直進安定性と曲線通過性能の改善(機械力学,計測,自動制御)

概要

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In order to run safely and smoothly though curved tracks, the gauge of track has been widened in curved sections. In recent years, however, the gauge widening (GW) was reduced due to some causes, such as, the decrease of three-axle bogies, the increased accuracy of track maintenance, etc. But the GW has the original purpose that gives the rolling radius difference of inner/outer wheels which produces the steering effect. The reduction of GW may lead to the decrease of running ability, especially curving performance, and increase of abnormal wear, such as rail corrugation. In this study the authors examine how GW affects running performance by using numerical simulations and full-size stand tests. Through these results we conclude; (1) the increase of GW produces more rolling radius difference and improves curving performance, and these tendencies become more remarkable for large value of GW, (2) for more than some value of GW, the running stability also increases according to GW expansion because of the reduction of the equivalent conicity of wheels.
社団法人日本機械学会の論文
2009-04-25