Analysis on Running Safety for KTX Vehicle

KTX차량의 주행 안전성 해석

  • 김재철 (한국철도기술연구원, 철도시스템연구본부) ;
  • 함영삼 (한국철도기술연구원, 철도시스템연구본부)
  • Published : 2007.10.31


Lateral vibration at the tail of KTX train was found during the acceptance test. In order to settle the problem of lateral vibration, the wheel conicity was changed 1/40 to 1/20. However, we should evaluate the running safety of vehicle with 1/20 wheel conicity because modification of wheel conicity may cause the running performance to be worse and critical speed to reduce. In this paper, we calculate critical speed of KTX bogie as wheel conicity increase and analyze the running safety for KTX that has 20 car trainset formation using VAMPIRE. and compare with the test results of KHST to validate analysis results on high speed line. A analysis results show that critical speed of 0.3 wheel conicity is over 375km/h and curving performance of 1/20wheel conicity is better than 1/40. Also, we examinate the running performance of KTX to check out possibility to increase speed of KTX on conventional line. A analysis results show that it is possible to increase up to 10% the speed of KTX on tangent line but KTX on a curved line should be operated with the speed of conventional train.


  1. 김재철(2003), '고속철도 차량 주행특성 연구', 한국철도기술연구원 보고서
  2. 강부병, 김영우, 왕영용(2003), 'KTX 차량 후미진동 해석(I)', 한국철도학회 논문집, 제6권, 제2호, 한국철도학회, pp.122-128
  3. 김남포(1996), '대구-부산간 기존선 이용 고속철도차량의 주행속도 향상에 관한 연구', 한국철도기술연구원 보고서