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http://dx.doi.org/10.5762/KAIS.2020.21.3.32

A study on Analysis of Impact Deceleration Characteristics of Railway Freight Car  

Son, Seung Wan (Railroad Safety Research Team, Korea Railroad Research Institute)
Jung, Hyun Seung (Railroad Safety Research Team, Korea Railroad Research Institute)
Hwang, Jun Hyeok (Railroad Safety Research Team, Korea Railroad Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.3, 2020 , pp. 32-38 More about this Journal
Abstract
This study examined the problems of existing vehicles to propose alternatives to improve the crashworthiness of railway freight cars through collision acceleration analysis using a one-dimensional collision analysis method. A collision scenario of railway shunting and crash accidents was selected from the collision accident cases and international standards. A one-dimensional collision simulation using LS-DYNA was performed according to those scenarios. As a result, the acceleration level of the freight wagon was calculated to be under 2g and was predicted to meet the EN 12663 standard in the shunting situation. On the other hand, the result of crash simulation with an impact velocity between 10 and 15 km/h revealed the shock absorber capacity of the railway coupler to be insufficient in a crash situation, resulting in increased acceleration, and carbody deformation could be predicted. As a method of improving the crashworthiness, a deformation tube-type energy absorber was applied to the coupler system, and collision analysis was performed again with new energy absorption strategy. Overall, the simulation showed that the acceleration level was decreased by 12% of the conventional freight-car energy absorption system.
Keywords
Crashworthiness; Railway freight car; Railway coupler; Collision energy absorber; LS-DYNA;
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  • Reference
1 LSTC, LS-DYNA Theory manual, Livermore Software Technology Corporation, Michigan, 2015.
2 Ministry of Land, Infrastructure, Transportation, Railway Accident Casebook 2016, Ministry of Land, Infrastructure, Seoul, 2016.
3 European Committee for Standardization, BS EN12663-2:2010 Railway applications - Structural requirements of railway vehicle bodies Part 2 : Freight wagon, 2010.
4 US Code of Federal Regulation, 49CFR179-Specifications for Tank Cars, 2011.
5 Avitation and Railway Accident Investigation Board, ARAIB/R 2014-6 Joongang line Top-ri $\rightarrow$ Bibong Railway freight car crash accident report, 2014.
6 H. S. Jung, T. S. Kwon, J. S. Koo, "A Study on Rolling Stock Shunting Impact Analysis using LS-DYNA", Proceedings of the Korean Soc. Railway spring conference , pp.25-30, 2006.
7 DMSR Website, Couplers for Passenger cars, Freight cars[Internet], Available From: http://www.dmsr.co.kr/ (accessed Nov. 20, 2018)
8 H. S. Jung, S. W. Son, T. S. Kwon, J. S. Kim "Study on Computational Simulation of Metro Collision Accident and Improvement of Passive Safety", Transaction of the Korean Society of Mechanical Engineers - A, Vol.39, No.9, pp.885-892, Sep. 2015. DOI: http://dx.doi.org/10.3795/KSME-A.2015.39.9.885
9 US DOT, FAST Act requirements for Flammable Liquids and Rail Tank Cars, 2016.
10 R. A. Mayville, R. G. Stringfellow, K. N. Johnson, S. Landrum., Crashworthiness Design Modifications for Locomotive and Cab Car Anticlimbing Systems, Technical Report, D. Little Inc., U.S. Department of Transportation, US, 2003
11 C. H. Lim, B. C. Goo, "A Study on Improvement of Structural Strenth Evaluation Methods for Tank Car used for Carrying Hazard Materials", Fire Science and Engineering , Vol.22, No.3, pp.239-245, Sep. 2008
12 S. K. Lee, Dangerous Article Transportation Safety Criteria and System Setup, Technical Report, Seoul Nat'l University of Technology, pp.350-632, 2008.
13 European Committee for Standardization, BS EN15227 : 2008 Railway applications - Crashworthiness requirements for railway vehicle bodies, 2010
14 M. Y. Park, Y. I. Park, J. S. Koo "Equivalent Modeling Technique for 1-D collision Dynamics Using 3-D Finite Element Analysis of Rollingstock", Journal of the Korean Society for Railwy, Vol.13, No.2, pp.139-146, Apr. 2010.
15 I. Simon, Hanbook of Railway Vehicle Dynamics, pp.239-277, CRC Press, New York, 2006. DOI: https://doi.org/10.1201/9781420004892