Research Of Vibration Transmission Characteristics Of High-Speed Train Bogie Based On Vehicle Inspection Data

In recent years, with the rapid development and increasing operation speed of China’s high-speed railway, the safety and reliability in the operation of Emu is becoming more and more important. Current safety assessment research on bogie is mostly use simulation method, carried out by simulation software, such as SIMPACK. ANSYS and so on. This way is limited in the embodiment of bogie components’ real operation, the actual situation of the rail track, which resulting in the analysis results is not much actual reference. In this case, doing research of vibration transmission characteristics based on vehicle inspection data of train when the train is in service is of great practical significance.In this paper, a series of research on the CRH380BL type high speed emu bogie are completed.Firstly, monitoring vibration acceleration of a certain CRH380BL train in the daily operation, then obtain vibration data. Get the related GPS data, routing information and inventory information. Counting and analyzing the bogie frame’s vibration characteristics in different speed, different mileage, different operating range, before and after wheelset lathing in order to get the changing rule of the vibration characteristics under different working conditions.Secondly, doing correlation analysis of different parts of the bogie. Through the analysis, obtain correlation coefficient between the various components, it show a positive correlation between the different positions of the same the bogie. Further analysis is the con-elation between the bogie frame and other components, conclusions appear below. In vertical direction, the vibration of frame is greatly influenced by the same side axle box, which shows a large correlation. The correlation coefficient is more than 0.7. and the relative position of frame and axle box closer, the vertical correlation more obvious. Laterally, shows a significant correlation between the bogie frame in different positions, the correlation is greater than 0.7, which is bigger than the vertical correlation. Vibration acceleration from different part of the same frame all show correlation with sleeper and axle box, while closer the relative position. greater the correlation coefficient.In the last chapter, investigate the vibration characteristics and the dynamics frequency transference of axle box. frame and carbody of the high-speed EMU. The amplitude and spectrum power density of the acceleration of the axlebox is decreased by 10 percent and 1 percent approximately from the axlebox to carbody. During the transfer process, the high frequency vibration (more than lOOHz) has been effectively damped, while the low frequency vibration (mainly concentrated in the 0-6Hz, 15Hz, 30～50Hz) is not obvious attenuation effect. With the increase of the train running speed, the axle box, frame and car body are more likely to have higher frequency components. In the same wheel turning cycle, the mileage increases have little effect on the frequency components, but there is an increasing trend of axle box spectral peaks. Under certain conditions, the horizontal and vertical frequency component of different parts show little difference, and the same with the main frequency range.