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

The Korean Society of Mechanical Engineers (대한기계학회)
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Weight Reduction of an Urban Railway Axle Based on EN Standard

EN 규격에 기반한 도시철도차량 차축의 경량화

  • Han, Soon-Woo (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Son, Seung-Wan (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Jung, Hyun-Seung (New Transportation Systems Research Center, Korea Railroad Research Institute)
  • 한순우 (한국철도기술연구원 신교통연구본부) ;
  • 손승완 (한국철도기술연구원 신교통연구본부) ;
  • 정현승 (한국철도기술연구원 신교통연구본부)
  • Received : 2011.09.29
  • Accepted : 2012.03.05
  • Published : 2012.05.01
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Abstract

Weight reduction of a railway axle, which is one of heaviest parts in an urban railway vehicle, is discussed in this paper. A wheelset of a railway vehicle is very important with regard to railway safety, and its structural strength should always be considered when attempting to reduce the railway axle weight. In this work, the weight of the axles of a trailer bogie and a motor bogie of the Korean EMU was reduced by replacing solid axles with hollow axles. On the basis of the EN standard for railway axle design, the strength of existing solid axles was analyzed and the required bore size of a hollow axle was determined. It is shown that the weight of the concurrent axle of the Korean EMU can be reduced by up to 20% with a very small decrease in the structural strength. Finite element analyses were also carried out to verify the design result for lightweight hollow axles.

도시 철도차량의 윤축은 차량 안전에 있어서 매우 중요하지만, 차량 전체의 중량에서 큰 비중을 차지하는 요소로서 철도차량의 경량화에 있어 필수적인 고려 대상이다. 본 연구에서는 현재 중실축인 한국형 표준전동차의 부수 차축과 동력 차축을 중공축화하여 경량화하고자 하였으며, 객관적인 강도 평가를 위해 EU의 차축 설계 및 강도 평가 기준을 적용하였다. 현재 중실 차축의 강도를 평가하고, 이와 동일한 하중 조건에서 중공화된 차축의 응력 수준을 계산하여 현실적으로 적용 가능한 중공축의 내경크기를 결정하고 경량화율을 추정하였다. 또한, 중실차축 및 중공차축에 대해 유한 요소 해석을 수행하여 계산 결과의 타당성을 검증하였다.

Keywords

References

  1. Hirakawa, K. and Kubota, M., 2001, "On the Fatigue Design Method for High-Speed Railway Axles," Proc. Instn. Mech. Engrs., Vol. 215, pp. 73-82.
  2. Korea Railroad Research Institute, 2010, "A Study on the Weight Reduction of a Railway Vehicle System for Green Train," Research report of KRRI.
  3. Iwnicki, S., 2006, Handbook of Railway Vehicle Dynamics, Tayler & Francis, Boca Raton, pp. 39-83.
  4. Japanese Standards Association, 2011, Japanese Industrial Standard E4501:1995 Axles for Railway Rolling Stock.
  5. Technical Committe CEN/TC 256, 2009, BS EN 13103:2009 - Railway Applications - Wheelsets and Bogies - Non-Powered Axles - Design Method, British Standards Institution.
  6. Technical Committe CEN/TC 256, 2009, BS EN 13104:2009 - Railway Applications -Wheelsets and Bogies - Powered Axles - Design Method, British Standards Institution.
  7. Ham, Y. S. and You, W. H., 2011, "Measurement and Evaluation Methods of Derailment Coefficient for Railway Vehicle," Proceedings of KSME Dynamics and Control, pp. 96-97.
  8. Altair Engineering, 2008, "RADIOSS Linear," HyperWorks 9.0 Training book.
  9. Gooyer, L. and Overbeeke, J., 1991, "The Stress Distributions in Shouldered Shafts Under Axisymmetric Loading," The Journal of Strain Analysis for Engineering Design, Vol. 26, No. 3, pp. 181-184. https://doi.org/10.1243/03093247V263181
  10. Alfi, S., Mazzola, L., Bruder, T. and Luke, M., 2007, "Numerical Simulation of Improving the Design of Running Gear PART 2 : Improvement of Wheelset Durability and Safety," Proceeding of BOGIE07 Conference.
  11. Battenbo, H. and Baines, B.,1974, "Numerical Stress Concentrations for Stepped Shafts in Tortion with Circular and Shaped Fillets," The Journal of Strain Analysis for Engineering Design, Vol. 9, No. 2, pp. 90-101. https://doi.org/10.1243/03093247V092090

Cited by

  1. Study on Design of Railway Hollow Axle vol.22, pp.4, 2014, https://doi.org/10.7467/KSAE.2014.22.4.046