독립 회전 차륜이 적용된 철도 차량의 새로운 동특성 모델을 이용한 안정성 해석

초록

ABSTRACT The latest TRAM has developed with a low floor structure to support convenience for the mobility handicapped. Almost a TRAM adopted an IRWs for the low floor structure. The early days an IRWs were introduced to reduce hunting stability of the conventional bogie, but an IRWs has several inherent problems like insufficient guiding effort and excessive wear. In this investigation dynamic stability of independently rotating wheel systems are discussed. Generally an IRWs are known as more stable than a conventional wheelset, because an IRWs doesn't have a hunting motion due to longitudinal creepage. but, recent researches prove that a longitudinal creepage can't neglect totally. Also, this paper describe about development the new dynamic model using a gravitational stiffness by longitudinal creepage and dynamic stability analysis results. The stability analysis was accomplished by eigen value analysis of system matrix of dynamic model, and Several variables which affect on stability was investigated. Finally the effects of various configurations of vehicles typically mass, dimension, stiffness and damping coefficients are analyzed.