Analysis on the Hunting Motion of the KTX Power Car

KTX 동력차의 헌팅운동 해석

  • 이승일 (한국철도대학 차량기계과) ;
  • 최연선 (성균관대학교 기계공학부 기계진동연구실)
  • Published : 2004.06.01


Dynamic analysis of the KTX can predict the dynamic motions in test drive. In this study an analytical model of the KTX is developed to find the critical speed. The numerical analysis for the nonlinear equation motions of 17 degrees of freedom shows the running stability and the critical speed due to the hunting motion of the KTX. Also, the vibration modes of the KTX are calculated using the ADAM/RAIL software, which show that the critical speed occurs for the yawing modes of the car body and the bogie. Finally, this paper shows that the critical speed of the KTX could be changed with the modifications of the design parameters of wheel conicity or wheel contact length.


Critical Speed;Hunting;Running Stability;Vibration Mode;Frequency Analysis;KTX


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