Study on Abnormal Vibration of Wood Floor of EMU Car Body
With the increasing running speed of EMU,much more importance is attached to the lightweight design for car body,and further research on the influence of the reasonable design over the stability and comfort in operation is necessary.The rigid-flexible coupling dynamics model of the car body with wooden floor is established by using the multi-body dynamics software SIMPACK,the stability and comfort of the car body with wooden floor under the condition of wearing wheels are calculated,and the wooden floor of the car body is optimized to meet the stability and comfort indicators of the train operation.The results show that the floor of the car body perpendicular to the air spring will be subject to the irregularity excitation from the track during the operation of the vehicle.When the excitation is consistent with the natural mode of the floor,it will inevitably cause the resonance of the wooden floor,resulting in the wooden floor comfort exceeding the standard.The modal frequency of the wood floor is improved for frequency error processing,enabling the comfort of the wood floor to reach a reasonable range.
万方数据
维普
