Research On High Speed Emu Under Strong Wind Wheel Wear Influence On The Vibration Characteristics Of The Structure

The phenomenon of wheel wear is widespread in railway transportation.Severe wheel wear will cause large changes in the wheel-rail contact relationship,directly affecting the high-speed train's operational safety,ride comfort,stability and operating costs.Investigations and studies have found that different track lines and EMU models have different effects on wheel wear.The Lanzhou-Xinjiang High-speed Railway is China's first high-speed railway built at high altitudes and high altitudes.The weather along the line is harsh and the line conditions are complex.The application environment of the alpine,wind,and sand will have a great impact on the wheel-rail relationship of the EMU.According to the application environment of the Lanzhou-Xinjiang High-speed Railway,this paper carries out the research work on the wheel wear and vibration characteristics of CRH5 G EMU in Lanzhou-Xinjiang High-speed Railway,studies the change law of wheel wear and vibration characteristics with the mileage of the vehicle.The data of 10 weather observation points along the Lanzhou-Xinjiang High-speed Railway were collected,and the wind speeds of 10 meteorological observation points were summarized.The effects of wind speed changes on the vibration characteristics and wheel wear of the EMU were comprehensively analyzed.At the same time,statistics and analysis were performed on the data of the wheel repairs of 9 CRH5 G EMU attached to Lanzhou Bureau.The CRH5 G EMU wheels running on the Lanzhou-Xinjiang High-speed Railway were combined with the vibration and wear of the CRH5 G EMU operated by the Harbin-Dalian High-speed Railway.The repair cycle was studied and combined with long-term tracking of the vibration of the vehicle,the opinion of the wheel repair was given.The test results show,the spectrum amplitude of 4Hz~7Hz in the lateral acceleration spectrum of the architecture slightly increases under the condition of strong wind,and the frequency spectrum of the 4Hz~8Hz frequency spectrum of the lateral acceleration of the vehicle body is significantly increased under the condition of strong wind.There are no significant changes in both the frequency and time domain characteristics of vehicle body vertical and architecture vertical acceleration.After the tested EMU were operated for146,000 kilometers,the average wear of the tread was 0.62 mm,the average tread wear of100,000 kilometers was 0.42 mm,the average wear of the rim was 0.26 mm,and the average rim wear of 100,000 kilometers was 0.18 mm.The wheel wear rate of the CRH5 G EMU train operated on the Lanzhou-Xinjiang High-speed Railway is similar to the wheel wear rate of the CRH5 G EMU train operated by the Harbin-Dalian High-speed Railway.The CRH5 G EMUtrain operated by the Lanzhou-Xinjiang High-speed Railway The maximum value of the lateral acceleration of the 143,000 kilometers architecture is 0.74 g,the maximum value of the lateral stability of the vehicle body is 2.86,and the vehicle body and the acceleration have obvious low-frequency wobbles.Wheel and rail matching equivalent taper average 0.33.Which is combined with the tracking data of CRH5 G EMU of Harbin-Dalian High-speed Railway.It also considers the phenomenon of high-frequency abnormal vibration such as wheel polygon and rail corrugation appearing on the Lanzhou-Xinjiang High-speed Railway.It is recommended that the Lanzhou-Xinjiang High-speed Railway CRH5 G EMU maintain a150,000-kilometer repair cycle.