The Vibration Characteristic Analysis Of The Bogie By Eccentric Wheel

The development of the railway transportation tremendously accelerates national economy developing. With the development of the opening to the world and the national economy, raising travel speed is developmental tendency of the railway transportation. Our national railway had raised travel speed of railway transport six times until 0 o'clock am on April 18, 2007. Following the raising speed of the train, the various of the vehicle vibration problem has started to emerge and bogie vertical vibration is particularly prominent. The passenger will feel fatigue taking in the car that unceasingly vibrates. Fierce vibration causes the quality of vehicle operation drop and results in the frequent failure of certain components, endangering the traffic safety. The Harbin to Beijing's Z15/16 train is newest manufacture 25T vehicle and its bogies are CW-200K. The situation of the bogie is stable in the early operation. But after running of 300,000 kilometers, the train appears axle-box hydraulic pressure shock absorber expiration and axle-box spring fatigue expiration that endangers the traffic safety.This paper uses the theory and methods of vehicle dynamics to establish vertical vehicle vibration model and vehicle/track lumped parameter model. The models are revised to conform to the actual situation. Dynamic equations of railway vehicle vibration are established by the model. Use Visual Fortran to solve dynamic equations of railway vehicle vibration, then obtains the vibration displacement of bogie frame that is under the harmonic orbit incentive and pseudo-random orbit incentive. Through the vibrating displacement analyzes Stress of the axle-box spring. The stress of axle-box spring and the theory of fatigue are used to judge axle-box spring fatigue life and mileage of vehicle running. This paper through the computer simulation analyzes the influence of the eccentric wheel on axle-box spring fatigue.