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- Title
400 km/h 高速铁路大跨度桥梁轨道 静态长波不平顺验收标准研究.
- Authors
李国龙; 高芒芒; 杨飞; 杨静静; 魏子龙; 孙宪夫
- Abstract
The vector distance difference method was no longer suitable for track acceptance on long-span bridges because of the large deformation of bridges.In order to solve the acceptance problem of track static longwave irregularity on long-span railway bridge under 400 km/h, firstly, this paper analyzed the influence on car body acceleration of Yuxi River bridge and Ganjiang bridge according to the bridges of Chengdu-Chongqing lines, and the sensitivity wavelength of comprehensive inspection train. It was suggested to use midpoint chord method to evaluate the static long-wave irregularity of 400 km/h high-speed railway track on long-span bridge considering the current standards. Then, the multi-rigid bodies model of the vehicle and the finite element model of CRTS Ⅲ were constructed based on the vehicle-track coupling dynamics theory. The calculations were systematically carried out using cosine wave irregularity and measured irregularity, and the track static long-wave irregularity acceptance standard of 400 km/h high-speed railway long-span bridge was proposed considering the influence on vehicle of profile design set on the long-span bridge. Finally, the value was verified by analyzing the track dynamic and static irregularity of Yuxi River bridge and the ballastless track spectrum of China’s highspeed railway. The results show that the car body vertical motion sensitive wavelength of CR450AF train under 400 km/h is 163 m. It is suggested to use 60 m midpoint chord measurement method to evaluate the track static long-wave irregularity of 400 km/h high-speed railway long-span bridge. The maximum value of 60 m midpoint chord of the track static longitudinal level on long-span bridge is 6 mm. The maximum value of 60 m midpoint chord of the track static alignment on long-span bridge is 4 mm. Moreover, it is found that the track static longwave alighment on the long-span bridge is easier to meet the acceptance value, while the track elevation deviation may exceed the limit because of the bridge deformation by temperature. Therefore, the temperature deformation of the long-span bridge of 400 km/h high-speed railway should be strictly controlled.
- Subjects
CHENGDU (China); CHINA; HIGH speed trains; LONG-span bridges; FINITE element method; RAILROAD bridges; VERTICAL motion; PROBLEM solving
- Publication
Journal of Railway Science & Engineering, 2023, Vol 20, Issue 5, p1902
- ISSN
1672-7029
- Publication type
Article
- DOI
10.19713/j.cnki.43-1423/u.T20220996