Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Analysis and Evaluation of the Distributed Control Braking System of Long Freight Car Brakes

장대화물열차의 분산제어 제동 시 연결기에 발생하는 충격력 해석 및 분석

  • Cho, Byung Jin (Department of Rolling Stoke System, Seoul National University of Science and Technology) ;
  • Lee, Jeong Jun (Department of Rolling Stoke System, Seoul National University of Science and Technology) ;
  • Shim, Jae Seok (Department of Railway Safety Engineering, Seoul National University of Science and Technology) ;
  • Koo, Jeong Seo (Department of Railway Safety Engineering, Seoul National University of Science and Technology) ;
  • Mun, Hyung Seok (Korea Railroad Research Institute)
  • 조병진 (서울과학기술대학교 철도차량시스템공학과) ;
  • 이정준 (서울과학기술대학교 철도차량시스템공학과) ;
  • 심재석 (서울과학기술대학교 철도안전공학과) ;
  • 구정서 (서울과학기술대학교 철도안전공학과) ;
  • 문형석 (한국철도기술연구원)
  • Received : 2018.11.14
  • Accepted : 2018.12.10
  • Published : 2019.02.28
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Abstract

In long freight trains, there is a brake time delay in neighboring freight cars, which causes damage and fractures in the couplers, especially at their knuckle. A problem in the couplers of the cars can cause derailment and damages of human life and property. In this study, maximum forces on the couplers are studied when a long freight car brakes with the brake delay time and coupler gap. We make a dynamic model of 50 freight cars and couplers, applying contact between the couplers and a characteristic curve to express the force and displacement of the buffers using SIMPACK, which is a multi-body dynamics program. We use EN 14531-2, which is a standard of freight car brakes, to verify the dynamic model. Then, we compare the analyzed impact force with the coupler knuckle standard after applying the two carriages of a locomotive in the model based on the dispersed double head control system. The result shows that all coupler gap conditions satisfy the infinite lifetime of the material when the brake delay time is 0.1 second.

Keywords

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