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Abstract: A new problem is faced by a new developed loco- motive. Line test result of C0—C0 axle locomotive indicates that the locomotive has good lateral and curve negotiating performance, but its vertical vibration acceleration reaches a high level. However regular dynamic analysis shows that its dynamical performance should be very well. According to the special phenomena, detail dynamical calculation on this locomotive is carried out. The cause of the problem is found through frequency analysis. The special phenomenon of high vertical vibrate is caused by a new dynamics phenomenon that is ignored for a long time in railway vehicles researches. The new dynamics phenomenon is the longitudinal vibration of wheelset, and it is one of the important reasons of wheel treads abnormal wears, wheel treads spalling.
Key words: Radial bogie Locomotive Dynamics
Acceleration Vertical vibration
CLC No: U260.331+.1
铁道部科技开发计划(2004J032)和西南交通大学博士生创新基金资助项目. Received 20060520, received in revised form 20061221
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