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


Vol. 34,  No. 5, pp. 139-143, Oct.  2019
10.14346/JKOSOS.2019.34.5.139


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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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  Cite this article

[IEEE Style]

조정길, 김용욱, 한재현, 최정균, 서경수, 구정서, "An Evaluation of Critical Speed for Draft Gear using Variable Formation EMU," Journal of the Korean Society of Safety, vol. 34, no. 5, pp. 139-143, 2019. DOI: 10.14346/JKOSOS.2019.34.5.139.

[ACM Style]

조정길, 김용욱, 한재현, 최정균, 서경수, and 구정서. 2019. An Evaluation of Critical Speed for Draft Gear using Variable Formation EMU. Journal of the Korean Society of Safety, 34, 5, (2019), 139-143. DOI: 10.14346/JKOSOS.2019.34.5.139.

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