Analysis and Monitoring Method of Subway Vehicle Abnormal Jitter
To address the problem of abnormal jitter of a subway vehicle during operation,the causes of jitter are first analyzed based on the inspection results of the vehicle,and the analysis results are verified by collecting the vibration acceleration data of the vehicle body.The results show that the resonance occurs when the wheel rotation frequency with shelled tread is close to the first-order vertical bending mode frequency of the car body,and the vibration of the car body will be significantly intensified,causing the passengers to experience the abnormal jitter of the vehicle.Then the jitter monitoring method based on the root-mean-square acceleration of the car body is proposed,and the test data indicates that the index can effectively reflect the jitter state of the car body.Finally,suggestions are put forward to ensure the stable and safe operation of the vehicle.
NETL
NSTL
万方数据
