Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Wheel/Rail Contact Analysis with Consideration of Friction and Torque

마찰과 토크를 고려한 차륜/레일 접촉 해석

  • Received : 2013.06.25
  • Accepted : 2013.12.13
  • Published : 2014.02.28
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Abstract

Wheel/rail contact is a significant problem in railway dynamics. In this paper, the wheel/rail contact is examined analytically and numerically as a contact problem between two cylinders where torque and friction have effect. Furthermore, the contact of a real wheel and rail is investigated numerically where the normal and shear force act. This study demonstrates that the wheel/rail contact is a process that generates traction force through creep where rolling and sliding occurs simultaneously depending on the shape of the wheel and rail, and the friction coefficient between them.

차륜/레일 접촉은 철도차량의 동특성을 결정하는 중요한 요소이다. 본 연구에서는 철도 차륜과 레일 사이에 작용하는 토크에 의한 견인력과 마찰력을 두 원통의 접촉문제로 이론해석과 전산해석을 하고 수직하중과 전단력이 작용하는 실제 차륜과 레일에 대한 전산해석을 하였다. 철도차륜과 레일 접촉문제는 구름과 미끄러짐이 있는 탄성접촉인 크리프에 의한 크리프힘을 생성하는 과정으로서 차륜과 레일의 형상 및 마찰계수에 따라 달라짐을 알 수 있었다.

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References

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