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- Title
轴承滚子缺陷激励下高铁轴箱 系统振动特性研究.
- Authors
廖小康; 何江; 林鹏飞; 何刘; 易彩; 林建辉
- Abstract
Taking the wheel set and axle box system on the bogie of a high-speed railway train as the research object, a vehicle track coupling dynamic model including the defect of bearing roller was built. The effectiveness of the axle box bearing-vehicle-track coupling dynamic model was verified by using the field test data. The vibration acceleration time history of the axle box and the roller-outer raceway contact load time history under the excitation of the random track irregularity on the Beijing-Tianjin line were obtained through simulation. Combined with the bearing roller defect mathematical analysis model, the contact vibration characteristics of the internal structure of the axle box system under the excitation of the bearing roller defect were studied. The research results show that when the bearing roller is defective, the lateral and vertical vibration acceleration envelope spectrum of the axle box has a peak vibration acceleration at the multiple frequency of the roller fault frequency and twice the roller fault frequency. The amplitude is modulated with the cage rotation frequency of 10.32 Hz. The frequency spectrum of the defective roller-outer raceway contact load is mainly distributed in the low frequency band of 0~100 Hz, and a series of peaks occur in the frequency band of 200~1 000 Hz with the rotation frequency of the bearing cage as the frequency interval. With the increase of the bearing roller defect width, the composition of the high frequency segment of the roller-outer raceway contact load gradually increases, indicating that the bearing roller defect width will gradually cause the medium and high frequency excitation of the bearing roller and the outer raceway, strengthen the dynamic action between the axle box bearing internals, and thus accelerate the fatigue failure of the bearing. When the train speed is about 250 km/h, the simulation data shows that the width of bearing roller defect should be limited within 1 mm, so as to minimize a series of problems such as structural fatigue caused by the increase of the roller-outer raceway contact load caused by the excessive defect width of bearing roller.
- Subjects
TIANJIN (China); BEIJING (China); VIBRATION (Mechanics); ROLLER bearings; BOGIES (Vehicles); MATERIAL fatigue; FREQUENCY spectra; RAILROAD trains
- Publication
Journal of Railway Science & Engineering, 2023, Vol 20, Issue 9, p3262
- ISSN
1672-7029
- Publication type
Article
- DOI
10.19713/j.cnki.43-1423/u.T20221893