The Structural Analysis And Dynamic Simulation For The EMU Power Bogie

The rapid development of China’s high-speed railway has a great influence on people’s lifestyle and economic development for the past few years and has won praise from all walks of life. Our production of CRH series EMU is not only operate in the Mainland successfully, but also explore the international market constantly and open up a Chinese-style high-speed rail diplomacy. As one of the important parts of the railway vehicle, bogie has an extremely effect on ease guide way irregularity impact on the vehicle, ensure good locomotive riding quality, safety, straight line stability and curve negotiation ability, reduce environmental pollution.so the design of bogie structure is the key to develop high-performance bogie.First, after an in-depth understanding of the Bogie development at home and abroad, and studying the theory of finite element analysis, the bogie frame model is established in PRO-E. Second, import the bogie frame model into the WORKBENCH to establish finite element model. Refer to the regulations of the UIC in Europe and the “Motive power units-Bogies and running gear-Bogie frame structure strength tests” in china, identified the combination condition needed to static simulation, after the analysis, which obtains bogie frame’s the equivalent stress and make the results. Thirdly, to carry out low order modes of the bogie frame, it obtains natural frequencies and mode shapes of the first six modal, then compares the result with the external excitation frequency under different speeds, it can be known that low-order frequencies is lower than excitation frequency, the Resonance does not occur, the vibration models meet stiffness requirements of the bogie frame. Fourthly, the dynamic model of high-speed EMU is established, the loads in the joint between car body support and bogie are calculated by using the SIMPACK multi-body dynamic analysis software. In Workbench software, the response of bogie frame is calculated through vibration characteristic methods, the results show that the easy resonance region of bogie frame is stable, the deformation is small, while at the critical vibration frequency, the stress is small, but also not threat to the frame. That all provides high-speed and stable operation theoretical support for high-speed EMU. Finally, the bogie frame is lightweight designed, it meets the strength requirements and decreases the cost, so as to improve its dynamic performance.It provides a theoretical reference and support for the future bogie frame designed, through the analysis of a certain type of high-speed EMU power bogie frame.