415 Three-dimensional Numerical Simulation for Railway Vehicles Considering Flexible Rail

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Other Title
  • 415 軌道柔軟性を考慮した車両・軌道系の三次元輪重変動解析

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Abstract

Numerical simulation is one of the effective methods for evaluating safety and stability of railway vehicles. In this paper, we formulated equations of motion of the 3D-models of vehicle and track considering 3D-contact geometry, rail flexibility and track irregularity. The simulation analysis on wheel load fluctuation was conducted to figure out the mechanism of wheel load fluctuation in consideration of rail flexibility, vehicle motion and track irregularity. As a result, following results were obtained. Rail flexibility has effect on the fluctuation of the contact force. Wheel load depends mainly on the wheel position on rail. When sleeper passing frequency becomes close to the 9th and 10th natural frequency of the vehicle/track model, the fluctuation of wheel load becomes larger due to the resonance of vehicle and track. The peak positons of wheel load and contact point between rail and wheel shift forward according to the vehicle speed. When the vehicle runs on irregularity, the effect of rail flexibility becomes less and the effect of the primary suspensions becomes larger as the wave height increases. The peak position of wheel load depends mainly on the force of primary suspension. Wheel load fluctuation on each wheel of vehicle is different because the force of the primary suspensions on each wheel is different.

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Details 詳細情報について

  • CRID
    1573387452298053248
  • NII Article ID
    110010054185
  • NII Book ID
    AA11901770
  • ISSN
    13480235
  • Text Lang
    ja
  • Data Source
    • CiNii Articles

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