| Railway transportation has entered the new era. Raising the speed of train is the priority selection to fit the era development. Development of high speed railway has become the new trend of railway passenger transportation. In order to improve the train speed under the premise of safety operation, Germany, France, Japan and other countries have carried out a lot of theoretical and experimental work for high-speed trains.The study experiments show: as a running component of the train, the bogie is one of the most important bearing mechanism, which the performance will directly affect the operation of the train and largely determine the quality of vehicle operation and safety.This paper was based on the research of the development of bogie as well as frame at home and abroad. Firstly, the paper refers to the concrete size, the material properties and other parameters of a certain EMU bogie frame type. Three-dimensional model of the bogie frame is established by SolidWorks, which will be imported into the ANSYS Workbench. Parameters of the material can be set according to the material properties. Model mesh can be generated as needed. The bearing condition of the frame is analyzed according to the static strength loading standard of the UIC615-4 power bogie under different working conditions, which the loading standard is formulated by the International Union of Railways. Then according to the result, static strength of the frame is analyzed under 16 kinds of different working conditions. The results show that the maximum stress value was appeared on the front of the side-beam inner side, which is 323 MPa. The maximum stress value is less than the material allowable stress and meets the requirements of static strength. Next, the natural vibration characteristics of frame is checked and evaluated by the modal analysis in ANSYS Workbench software. The basic frequency of the bogie frame 34.199 Hz can be obtained. This frequency is effectively differ from the main vibration frequency of the wheel-track interface and the natural vibration frequency of the car body as well as the suspension system, which won’t resonate and can meet the design requirements to prevent resonance. Based on the theory of vehicle dynamics, the actual load of the EMU bogie frame is calculated and analyzed. Dynamic model is established in SIMPACK dynamics simulation software with reference to the parameters of bogie and vehicle. The main load conditions of the bogie is simulated under the different speeds in straight line and curve conditions. The results show that, the maximum value of the lateral and vertical load on air spring is gradually increasing when the running speed is increasing in the linear operation condition. In the 8 000 m radius curve operation condition, the maximum value of the air spring lateral load is gradually decreased, and the maximum value of the vertical load was in the oscillation tendency when the vehicle speed was increased from 200 km/h to 300 km/h, as in a high state with the increasing of the running speed. In addition, the analysis results show that the load calculated by the UIC615-4 standards is relatively conservative, which there is adequate security. |
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