| The development of high-speed railway in China has deeply influenced economy and people’s life in rencent years. CRH series of high-speed EMU successfully operates in the mainland and constantly explores international market. The bogie can alleviate the shock from the roughness during running, which can ensure the stability, safety and curve passage capacity of the vehicle. Therefore, developing high-performance bogie is the key to the development of high-speed EMU technology.Firstly, based on the development of train bogie domestic and abroad, thesis builds the 3D model of bogie in Mechanism Design Software PRO/E, and introduces main process briefly. The interference of bogie is detected after assembled to ensure correction.Secondly, the finite element model of bogie is built in ANSYS WORKBENCH. According to the regulations of International Union of Railways Standard UIC515-4 and the working condition, thesis analyses bogie in static simulation and assesses its equivalent stress.Thirdly, the bogie frame is modal analyzed. The first six order natural frequency is effectively differ from the external excitation frequency from all kinds of running conditions, which won’t cause resonance. Each order modal can meet the stiffness requirements.Finally, the maximum force of the frame conditions is optimized according to correlation theories. After optimization, overall weight of the frame is reduced by 2.45 %, the maximum deformation and the maximum equivalent stress both meet the requirement of the strength, and the inherent frequency is far greater than excitation frequency which meets stiffness requirement. All parameters can reach the purpose that the bogie frame can be optimized and the dynamic characteristic can be improved.Thesis analyses the bogie of a certain high-speed EMU trailer, and provides support for other design of bogie in the future. |
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