Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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An Evaluation of Critical Speed for Draft Gear using Variable Formation EMU

도시철도차량의 가변편성을 고려한 고무완충기의 임계속도 평가

  • Cho, Jeong Gil (Rolling Stock Research Team, Research Institute, Seoulmetro) ;
  • Kim, Y.W. (Rolling Stock Research Team, Research Institute, Seoulmetro) ;
  • Han, J.H. (Headquarter of the Rolling Stock, Seoulmetro) ;
  • Choi, J.K. (Headquarter of the Safety Management, Seoulmetro) ;
  • Seo, K.S. (Rolling Stock Research Team, Research Institute, Seoulmetro) ;
  • Koo, J.S. (Department of Railway Safety Engineering, Seoul National University of Science and Technology)
  • 조정길 (서울교통공사 도시철도연구원 전동차연구팀) ;
  • 김용욱 (서울교통공사 도시철도연구원 전동차연구팀) ;
  • 한재현 (서울교통공사 차량본부) ;
  • 최정균 (서울교통공사 안전관리본부) ;
  • 서경수 (서울교통공사 도시철도연구원 전동차연구팀) ;
  • 구정서 (서울과학기술대학교 철도안전공학과)
  • Received : 2019.05.30
  • Accepted : 2019.09.01
  • Published : 2019.10.31
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Abstract

In this study, we tried to derive the most severe scenario and its critical speed by 1-D collision simulation with a variable formation vehicle in order to prepare for the change of demand in Seoul Metropolitan Subway Line 3, which is operated by fixed arrangement. After establishing various collision scenario conditions, the friction coefficient between the wheel and the rail was evaluated as 0.3, which is considered to be severe. As a result of analysis according to all scenarios, the most severe scenario conditions were confirmed by comparing rubber shock absorber performance and vehicle collision deceleration. In addition, a typical wheel-rail friction coefficient was derived through accident cases, and the analysis was performed again and compared. Finally, the criterion of the critical speed in the condition of the friction coefficient of the normal wheel - rail condition was confirmed.

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References

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