The Study Of Vibration Transfer Relationship Between Railway Vehicle And Hanging Equipment

China has been developing the domestic high-speed railway with great efforts now, the vibration of train and the equipments which are been hanging under the train is increasing with the velocity of locomotive train increasing. So, the studying of vibration transfer between the train and equipments and the reducing the vibration of the train and equipments are particularly necessary. Aimed at the vibration of the high-speed train and the equipments under the train and combined the simulation with the analysis of the measured vibration acceleration signal, this paper studied the vibration transmission regulations between the train and the apparatus.Firstly this thesis described the current status of the domestic and international researches in the field of vibration transmission, and introduced the development of the vibration energy method application in the vibration transfer at home and abroad, especially studied the application status of the power flow method.Then the paper introduced the basic theory of vibration transmission, and compared the force transmission ratio, vibration insertion loss, vibration level fall, the power flow and other vibration assessment methods which are commonly used in isolation. Simplifying the equipments and the train into a single support and single-incentive model, the paper derived the power flow transmission rate and the calculation formula of the power flow.Following it constructed the ANSYS finite element model of the train and the equipments under the train. Applying force on the equipment only and on equipments and train together, the paper summarized the general law the vibration transfer between the devices and train with the analysis of the amplitude and frequency characteristics of displacement responses which are pick up on the train and the equipments under the train.Finally, through the railway test of high-speed train, it measured the vibration acceleration signal of the equipment and train. When the train is running at different speeds levels or the devices are operating at various conditions, the paper compared the changes of the vibration acceleration amplitude. Using the acceleration signal gained from the test, it calculated the power delivery rate and gap flow with the MATLAB program, and compared the finite element results with simulation, and analyzed the effect of the vibration transmission between the train and devices which are hanging under the train.