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Study on the Levitation Stability of Maglev Vehicle considering the Vibration of Steel Switch Track

강재 분기기의 진동을 고려한 자기부상열차 부상안정성 연구

  • Han, Jong-Boo (Dept. of Mechatronics Engineering, Chungnam National University) ;
  • Park, Jinwoo (Dept. of System Dynamics Vibration and Shock Research Team, KIMM(Korea Institude Machinery & Materials)) ;
  • Han, Hyung-Suk (Dept. of Magnetic Levitation and Linear Drive KIMM(Korea Institude Machinery & Material)) ;
  • Lee, Jong-Min (Dept. of Magnetic Levitation and Linear Drive KIMM(Korea Institude Machinery & Material)) ;
  • Kim, Sung-Soo (Dept. of Mechatronics Engineering, Chungnam National University)
  • Received : 2015.03.03
  • Accepted : 2015.05.07
  • Published : 2015.06.30

Abstract

Generally, in the train area, switch tracks have required high reliability because this system is directly associated with derailment. Especially, switch tracks of Maglev vehicles must be moved in terms of the whole geometric characteristics, in which the bogies are encased in the switch track. For this reason, switch track was constructed with steel lighter than concrete girders. But, the steel switch track was weak because of structural vibration as well as structural deformation. Therefore, it is important to predict the levitation stability when a vehicle passes over flexible switch track. The aims of this paper are to develop a coupled dynamic model to describe the relationship between a Maglev vehicle and switch track and to predict the levitation stability. In order to develop the coupled dynamic model, a three dimensional vehicle model was developed based on multibody dynamics; a switch model was made using the modal superposition method. And, the developed model was verified using comparison measured data.

일반적으로 열차분야에서 분기기 시스템은 안전성과 직접적으로 연관되기 때문에 높은 신뢰성이 요구된다. 특히 자기부상열차의 분기기 시스템은 대차가 궤도를 감싸는 구조적 특징으로, 고가궤도 전체가 움직여야 한다. 이러한 이유로 자기부상열차의 분기기는 강 재질로 설계되었다. 강 거더의 분기기는 콘크리트 거더에 비하여 진동측면뿐만 아니라 거더의 처짐에도 취약하다. 그러므로 자기부상열차가 유연한 분기기 위를 통과 할 때, 부상안정성 예측이 매우 중요하다. 본 논문의 목표는 자기부상열차와 분기기 거더의 연성된 동역학 해석모델을 개발하고, 공진예측 및 차량의 부상안정성 예측에 있다. 이를 위해서 차량의 3차원 다물체 동역학 모델을 개발 하였고, 분기기 거더와 모달중첩법을 이용한 연성모델링을 수행하였다. 개발된 해석모델은 실측 실험과 비교를 통해서 해석모델의 타당성을 검증하였다.

Keywords

References

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