Acceptance standard for track static geometric long-wave irregularity of long-span railway bridge under 400 km/h

被引：0

作者：

Li G. ^{[1
]}

Gao M. ^{[1
]}

Yang F. ^{[1
]}

Yang J. ^{[1
]}

Wei Z. ^{[1
]}

Sun X. ^{[1
]}

机构：

[1] Infrastructure Inspection Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing

来源：

Journal of Railway Science and Engineering | 2023年 / 20卷 / 05期

关键词：

400 km/h high speed railway; long-span bridge; midpoint chord measurement method; sensitive wavelength; track static geometric long-wave irregularity; train-track coupling dynamics;

D O I：

10.19713/j.cnki.43-1423/u.T20220996

中图分类号：

学科分类号：

摘要：

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. © 2023, Central South University Press. All rights reserved.

引用

页码：1902 / 1916

页数：14

共 21 条

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