STUDY ON THE EFFECT OF TRACK IRREGULARITY ON VEHICLE DYNAMICS AT HIGH SPEED PASSAGE OF TURNOUTS

DOI

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Other Title
  • 論文 分岐器の高速通過時において軌道変位が車両運動に及ぼす影響に関する検討

Description

<p> In the former Japanese National Railways, the instructions for track maintenance values for irregularity of longitudinal level, alignment, cross level were set more strictly for high-speed turnouts that pass through the reference line at maximum speed 120 km/h than pass through at speeds of less than 120 km/h. This value was set based on the occurrence of significant lateral force at rail joints and crossings during turnout speed-up running tests. However, since individual countermeasures have been implemented for the occurrence of significant lateral force, the maintenance values for track irregularity may be set more strictly than necessary. Therefore, in order to establish maintenance values based on technical evidence, this study examined the effect of track irregularity on vehicle dynamics during high-speed passage through turnouts using MBD. The results show that the current maintenance values for high-speed turnouts have a small effect on vehicle dynamics. In addition, a case study was conducted using values larger than the current maintenance values to confirm the limits of acceptable track irregularity.</p>

Journal

  • Journal of Railway Engineering

    Journal of Railway Engineering 28 (1), 108-115, 2024

    Japan Society of Civil Engineers Committee on Structural Engineering Liaison Committee on Railway Engineering

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