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http://dx.doi.org/10.14346/JKOSOS.2019.34.5.139

An Evaluation of Critical Speed for Draft Gear using Variable Formation EMU  

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)
Publication Information
Journal of the Korean Society of Safety / v.34, no.5, 2019 , pp. 139-143 More about this Journal
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.
Keywords
EMU; 1D simulation; variable formation; critical speed; draft gear;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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