Abstract:With the increasing mileage and speed of operation, the wheel wear of high-speed EMUs in China is gradually increasing, at the same time, it has a certain impact on vehicle stability. Through a large number of line tests, it is shown that a large number of high-speed EMUs in China have a problem of carbody chattering, while a long distance of bogie hunting state appears in the operation. In this paper, in view of the above phenomenon, the wheel wear problem of the bogie hunting state of high-speed EMUs is analyzed, firstly, the high speed train vehicle dynamics model and Jendel wheel wear model are established, and the dynamic model validated by the test data, the wheel-rail contact parameters of the vehicle in the bogie hunting state are analyzed, and finally, the influence of with or without excitation, different hunting amplitude and line parameters on wheel wear studied. The results show that the wheel wear in the bogie hunting condition increases to different extend, while the larger the hunting amplitude value, the greater the wheel wear. In a long-term wear prediction of 200,000 km, it can be seen that tread wear is mainly concentrated between -40 mm and 30 mm, with a maximum wheel wear depth of around 0.58 mm. Therefore, it is necessary to pay attention to the stability of the hunting movement of the high-speed EMUs during the operation to avoid the phenomenon of wheel wear increasing caused by the bogie hunting.
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