Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Ride Quality Due to Deterioration Effects for the Coupler Types of Urban EMUs

도시철도차량의 연결기 종류별 노후화가 승차감에 미치는 영향 연구

  • Kim, Jun Woo (Department of Rolling Stock System, Seoul National University of Science and Technology) ;
  • Cho, Byung Jin (Department of Rolling Stock System, Seoul National University of Science and Technology) ;
  • Han, Eun Kwang (Department of Rolling Stock System, Seoul National University of Science and Technology) ;
  • Koo, Jeong Seo (Department of Rolling Stock System, Seoul National University of Science and Technology)
  • 김준우 (서울과학기술대학교 철도차량시스템공학과) ;
  • 조병진 (서울과학기술대학교 철도차량시스템공학과) ;
  • 한은광 (서울과학기술대학교 철도차량시스템공학과) ;
  • 구정서 (서울과학기술대학교 철도차량시스템공학과)
  • Received : 2017.02.20
  • Accepted : 2017.04.18
  • Published : 2017.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we studied the ride quality considering the deterioration effects of the three type couplers (single, double, and ring types) for EMUs. In order to know the impact occurred when an urban transit vehicle is under breaking, we tested the conditions of the service brake and the emergency brake. Normal coupler models without any slack showed similar dynamic performance results under all breaking conditions. But if the couplers become old, the initial pre-stresses are removed because of permanent compressive deformation in rubber. For three types of the old coupler models without the initial pre-stress, we evaluated dynamic performances of each type. As the results, the maximum and average acceleration levels of the double type and the ring type were similarly low in all conditions. But the accelerations of the single type coupler was high when compared to those of the double and ring types. In addition, Jerk value of the single type model associated with ride quality was high up to 15 times to the ring type in condition of the service braking in empty vehicle weight. Jerk value of the double type model was high up to 6 times to the ring type.

Keywords

References

  1. Y. H. Kim, K. N. Kim, H. M. Jang and Y. I. Park, "Modeling of Coupling Device for Crash Analysis of an Electric Vehicle", The Korean Society for Railway Autumn Conference, pp. 192-197, 2004.
  2. Ministry of Land, Infrastructure and Transport, "Regulations on the Safety Standards of Urban Railway", 2011.
  3. H. Y. Maeng, J. S. Kim and Y. I. Park, "Collision Simulation for the Coupler System of Rolling Stock", Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 22, No. 3-1, pp. 566-572, 2013. https://doi.org/10.7735/ksmte.2013.22.3.566
  4. J. S. Kim, J. H. Choi and Y. I. Park, "Characteristic Map of Hydraulic Buffer for Collision Simulation of Rolling Stock", Journal of the Korean Society of Safety, Vol. 31, No. 1, pp. 41-47, 2016. https://doi.org/10.14346/JKOSOS.2016.31.1.041
  5. H. M. Jang, K. N. Kim and Y. I. Park, "Comparison of Impact Simulation Result of for Rolling Stock Vehicle Coupler System", Journal of the Korean Society for Railway, Vol. 13, No. 3, pp. 251-256, 2010.
  6. H. Y. Maeng, J. S. Kim and Y. I. Park, "Collision Simulation for the Coupler System of Rolling Stock", Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 22, No. 3-1, pp. 566-572, 2013. https://doi.org/10.7735/ksmte.2013.22.3.566
  7. W. Y. Lee, "Analysis on the Cushion Characteristics of Draft Gears for Electric Railcars", Seoul National University of Science and Technology, 2015.
  8. LSTC, Ls-dyna Keyword User's Manual Version 971.
  9. Y. H. Kim, "A Study on the Selection of Train Operation Mode Minimizing the Running Energy Consumption", Seoul National University of Science and Technology, 2005.
  10. Ministry of Land, Infrastructure and Transport, "Technical Specification for Railway Vehicles", 2014.
  11. G. Y. Kim, J. S. Koo, "Development of FE Models of the Heavy Obstacle for the EU-TSI and Domestic Rolling Stock Safety Regulations and Application to Collision Evaluation of the Korean High-speed EMU", Journal of the Korean Society for Railway, Vol. 14, No. 4, pp. 333-340, 2011. https://doi.org/10.7782/JKSR.2011.14.4.333
  12. Z. Q. Xu, W. H. Ma, Q. Wu and S. H. Luo, "Coupler Rotation Behavior and its Effect on Heavy Haul Trains", Vehicle System Dynamics : International Journal of Vehicle Mechanics and Mobility, Vol. 51, No. 12, pp. 1818-1838, 2013. https://doi.org/10.1080/00423114.2013.834369
  13. Q. Wu, C. Cole, S. H. Luo and M. S. Spiryagin, "A Review of Dynamics Modelling of Friction Draft Gear", Vehicle System Dynamics : International Journal of Vehicle Mechanics and Mobility, Vol. 52, No. 6, pp. 733-758, 2014. https://doi.org/10.1080/00423114.2014.894199