Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Wheel Wear Analysis of Railway Vehicle on a Curved Section

곡선 구간에서 철도 차량 휠의 마모 특성 해석

  • Kang, Juseok (Dept. of Railway Vehicle System Engineering, Korea Nat'l Univ. of Transportation)
  • 강주석 (한국교통대학교 철도차량시스템공학과)
  • Received : 2015.09.14
  • Accepted : 2016.04.14
  • Published : 2016.06.01
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Abstract

The wheel wear of a railway vehicle is mainly generated when maneuvering on a curved track. The change in the wheel profile affects the dynamic stability of the vehicle. In this analysis, the wheel wear volume was calculated while changing the velocity and radius of the curve to analyze the wear characteristics of a wheel at a curved section. The wear index was calculated from a vehicle dynamic analysis based on a multibody dynamics analysis and wear volume from a wear model by British Rail Research. The wear volume at a radius of 300 m is dominant compared with other radii. The wear volume was calculated by assigning different coefficients of friction to the tread and flange of the wheel to investigate the effect of lubrication on the wear characteristics. The effect of the improvement by lubrication is calculated by varying the radius of the track, and is assessed on an actual urban railway section.

철도차량의 휠의 마모는 주로 곡선 주행 시 발생한다. 휠의 형상 변화는 차량 동적 안정성에 중요한 영향을 미친다. 본 연구에서는 곡선 주행 시 휠 마모 특성 분석을 위해 곡선 반경 크기와 속도를 변경시키면서 휠 마모량을 계산하였다. 다물체 동역학 해석에 기초한 차량 동역학 해석결과로부터 마모인자를 계산하고 BRR(British Rail Research)에서 제시한 마모 모델을 이용하여 휠의 마모량을 계산하였다. 반경 300m에서의 마모량이 다른 반경과 비교하여 매우 큰 것으로 나타났다. 곡선 선로에 윤활유를 도유하는 경우 마모 특성 변화를 분석하기 위해 휠의 답면과 플랜지 부위의 마찰계수를 다르게 하여 휠 마모량을 계산하였다. 도유 시 휠 마모의 개선 효과를 여러 반경에서 계산하고 실제 도시철도구간에서 마모 개선 효과를 확인하였다.

Keywords

References

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