Abstract
Wheel hollow wear is a common form of wheel‐surface damage in high‐speed trains, which is of great concern and a potential threat to the service performance and safety of the high‐speed railway system. At the same time, rail corridors in high‐speed railways are extensively straightened through the addition of bridges. However, only few studies paid attention to the influence of wheel‐profile wear on the train‐track‐bridge dynamic interaction. This paper reports a study of the high‐speed train‐track‐bridge dynamic interactions under new and hollow worn wheel profiles. A nonlinear rigid‐flexible coupled model of a Chinese high‐speed train travelling on nonballasted tracks supported by a long‐span continuous girder bridge is formulated. This modelling is based on the train‐track‐bridge interaction theory, the wheel‐rail nonelliptical multipoint contact theory, and the modified Craig–Bampton modal synthesis method. The effects of wheel‐rail nonlinearity caused by the wheel hollow wear are fully considered. The proposed model is applied to predict the vertical and lateral dynamic responses of the high‐speed train‐track‐bridge system under new and worn wheel profiles, in which a high‐speed train passing through a long‐span continuous girder bridge at a speed of 350 km/h is considered. The numerical results show that the wheel hollow wear changes the geometric parameters of the wheel‐rail contact and then deteriorates the train‐track‐bridge interactions. The worn wheels can increase the vibration response of the high‐speed railway bridges.
Highlights
Over the last decade, China has constructed the largest highspeed railway network around the world. e mileage of highspeed railway with train running speed from 200 km/h to 350 km/h in China exceeds 29,000 km
A series of severe challenges including the wear problems of the high-speed wheel/rail systems have to be faced during the operation stage of Chinese high-speed railways. e wear problems of the Chinese highspeed railway include the wheel polygons, rail corrugation, wheel hollow wear, wheel flange wear, rail side wear, and uneven welds, among which the wheel uneven wear is of great concern [1]
The traintrack-bridge dynamic interaction is of great interest in research field of high-speed railways
Summary
China has constructed the largest highspeed railway network around the world. e mileage of highspeed railway with train running speed from 200 km/h to 350 km/h in China exceeds 29,000 km. As a link connecting the train and the railway infrastructure, the wheel-rail contact relationship plays a crucial role in the high-speed train-track-bridge dynamic interaction. We present a study of the highspeed train-track-bridge dynamic interaction due to the wheel hollow wear, where the wheel-rail contact nonlinearities caused by wheel uneven wear are fully considered. Arvidsson et al [11] established a 2D train-track-bridge interaction model that allows for wheel-rail contact loss to analyze the dynamic performance of high-speed trains running on nonballasted bridges in Europe. E proposed model is applied to predict the vertical and lateral responses of the high-speed train-track-bridge system under new and worn wheel profiles, in which a high-speed train passing through a long-span continuous girder bridge at speed of 350 km/h is considered. Based on the measured high-speed train worn wheel profiles, the wheel-rail contact geometry of wheel profiles at different mileage was analyzed. e influences of wheel hollow wear on vibration responses of the high-speed train-track-bridge system are reported
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