Key Problems Faced in High-Speed Train Operation
This paper discusses some key problems faced in high-speed train operation. These problems include: wheel tread concave wear causing the lateral oscillation of the train in operation, wheel roundness higher-order polygonal wear leading to fierce vertical
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Contents 1 Introduction.......................................................................................................................... 2 Train-Track Coupling System Dynamic Model ................................................................. 3 Interaction of Wheel/Rail .................................................................................................... 4 Vibration and Noise ............................................................................................................ 5 Further Work ....................................................................................................................... 6 Appendix.............................................................................................................................. References ..................................................................................................................................
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1 Introduction At present, the total length of China’s high-speed railway is close to 12,000 km, more than the sum of the rest of the world’s high-speed railway coverage. Compared with other national high-speed railways, in addition to the first-class quality of train and track line, the train running speed is higher, the train marshaling is longer (16 coaches), the direct operating miles are longer (e.g., Harbin to Shanghai is 2421 km and Beijing to Guangzhou is 2289 km), the track stiffness is larger and the track lines have a higher proportion of bridges. As China’s high-speed railway network is completed in length and breadth, with a particular emphasis in the western areas, the direct operating mileage of trains will increase further, and the proportions of bridges and tunnels in the track lines will be further increased. Trains operating on long direct lines will be on continuous high-speed running, across different geographical areas, and in different running environments. Different regional geological conditions could influence the track’s behavior in various ways, including changes to the track support stiffness. Climate differences offer a different wheel/rail running environment, and a different abrasion state of X. Jin (&) State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China e-mail: [email protected] © Zhejiang University Press, Hangzhou and Springer Nature Singapore Pte Ltd. 2018 Y. Fang and Y.H. Zhang (eds.), China’s High-Speed Rail Technology, Advances in High-speed Rail Technology, https://doi.org/10.1007/978-981-10-5610-9_2
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wheel/rail. In addition, the wheel/rail adhesive coefficient difference is larger along a long track line. Large temperature differences can change greatly the operational features of the train and the track structure, even to the extent of affecting the vehicle system damping noise reduction effect. All this directly affects train dynamic behavior and operational quality, which makes it difficult to maintain long-term comfort, high stability and safety. To achieve such goals requires
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