FORMATION AND GROWTH MECHANISM OF INNER RAIL CORRUGATION ON STEEP-CURVED TRACK

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  • MATSUURA Akio
    社団法人 土木学会 芝浦工業大学 工学部土木工学科
  • UCHIDA Tadayuki
    社団法人 土木学会 芝浦工業大学大学院 工学研究科建設工学専攻
  • FUKUDA Takuya
    社団法人 土木学会 芝浦工業大学大学院 工学研究科建設工学専攻

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Other Title
  • 急曲線における内軌レールの波状摩耗発生メカニズムに関する研究
  • キュウキョクセン ニ オケル ナイキレール ノ ハジョウ マモウ ハッセイ メカニズム ニ カンスル ケンキュウ

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Abstract

As the corrugation on rail surface brings some practical problems about vibration or noise, it is important to investigate and clarify the formation and growth mechanism of the rail corrugation. In this study, the dynamic behavior between wheel and inner-rail is examined using a numerical simulation model and a new simple analytic model for the vehicle running on steep-curved track. It is concluded that both the wheel attack angle and the wheel load fluctuation makes a periodic movement between wheel and rail, i. e. the stick/slip motion, with increasing the rail tilting vibration, and that a small unevenness on the rail surface grows to the corrugation which has a constant wavelength decided by the running speed and the tilting natural frequency of inner-rail. Also, a global corrugation formation process is shown by parametric analyses.

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