Research Of Vehicle Model And Dynamic Characteristics Based On ANSYS

With the continuous development of science and technology and the needs of national life, it’s an inevitable trend to raise train speed and increase the load cap city of train, which, however, will inevitably aggravate the vibration of railway bridges. Therefore, it becomes more and more important to do research on train-bridge coupling vibration system. Otherwise, it’s significant to make a further study on the dynamic response of the bridge when the train running and the interaction between the train and the bridge, which can be better to study the comfort and stability of train running at high speed.Firstly, the thesis made a further analysis on train-bridge coupling vibration system in theory, which started from the train model, bridge model, the route model as well as the coupling relation between them, and the solving method of the model system, etc. Then made a summary comparison of the existing vehicle bridge coupling system, and then analyze the advantages and the disadvantages of each model.Each sub-model in the train-bridge system has played a crucial role in the study on train-bridge coupling vibration. Based on the understanding of the extensive the model and vehicle actual structure, the thesis utilized the structure analysis software ANSYS to have established perfect train model, which set aside the previous model restricted to the degrees of freedom of the system movement and various parts of the rigid body assumption, which can better simulate the actual movement of the train.At the same time, using the assumption of rigid body that establishment the simplified vehicle models, which are compared with physical model. Then utilized the ANSYS software respect to do modal analysis on the rigid train model and actual train model, and then obtain the natural frequency and basic modes of the two models. By the results of analysis, the rigid simplified vehicle model and actual train model natural frequency difference in the same basic modes. Because the entity model is established based on actual vehicle construction of vehicles, taking into account more factors, could be avoided in this vehicle model describes entities more adversely affects the overall system model is a problem solving, in examining the overall system response of entities vehicles models is necessary.