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Study on the Dynamic Behavior Characteristics due to the Unbalance High Speed Railway Vehicle Wheel

고속철도차량용 차륜 불평형에 의한 동적 거동 특성 연구

  • Lee, Seung-Yil (Railway Vehicle System Engineering. Dept, Korea National University of Transportation) ;
  • Song, Moon-Shuk (Railway Vehicle System Engineering. Dept, Korea National University of Transportation)
  • 이승일 (한국교통대학교 철도차량시스템공학과) ;
  • 송문석 (한국교통대학교 철도차량시스템공학과)
  • Received : 2016.05.02
  • Accepted : 2016.07.07
  • Published : 2016.07.31

Abstract

This occurs when the unbalanced rotating body is inconsistent with the mass center line axis geometric center line. Wheelsets are assembled by a single axle with two wheels and a rotating body of a running railway vehicle. Owing to non-uniformity of the wheel material, the wear, and error of the wheel and axle assembly may cause an imbalance. Wheelsets will suffer the effects of vibrations due to the unbalanced mass, which becomes more pronounced due to the thin and high-speed rotation compared to the shaft diameter This can affect the driving safety and the running behavior of a rail car during high-speed running. Therefore, this study examined this unbalanced wheel using a railway vehicle multibody dynamics analysis tool to assess the impact of the dynamic VI-Rail movement of high-speed railway vehicles. Increasing the extent of wheel imbalance on the analysis confirmed that the critical speed of a railway vehicle bogie is reduced and the high-speed traveling dropped below the vehicle dynamic behaviour. Therefore, the adverse effects of the amount of a wheel imbalance on travel highlight the need for management of wheel imbalances. In addition, the static and dynamic management needs of a wheel imbalance need to be presented to the national rail vehicles operating agency.

Acknowledgement

Supported by : 한국교통대학교

References

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