Dynamic Characteristics of High-Speed Trains in Differential Subgrade Settlement Zone of Ballastless Track

被引：0
|
作者：
Zhang Q. [1 ]
Cai X. [1 ]
Zhong Y. [1 ]
Wang Q. [1 ]
Dong B. [1 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2023年 / 58卷 / 01期
关键词：
ballastless track bed; dynamic analysis; plastic damage; subgrade settlement;
D O I：
10.3969/j.issn.0258-2724.20210830
中图分类号：
学科分类号：
摘要：
To study the effect of differential subgrade settlement on the potential damage of ballastless track and the dynamic response of high-speed trains, based on the concrete plastic damage theory, a vehicle-ballastless track-subgrade coupling dynamic model that considers the ballastless track bed damage is established. The applicability of the model is demonstrated by comparing with the calculation results of the linear elastic model. The effects of subgrade settlement wavelength, amplitude and the vehicle speed on the dynamic characteristics of high-speed trains are analyzed. The results show that, the differential subgrade settlement could cause the damage to ballatless track bed. The results of the concrete plastic damage model of ballastless track are more in line with actual service status of the track. Among the vehicle dynamics indicators, the vertical acceleration of the vehicle body is most affected by the subgrade settlement amplitude. The vehicle dynamics response is sensitive to the differential subgrade settlement with a wavelength below 20 m, so it should be paid more attention to. The increase of the train speed increases the dynamic response of the vehicle, the wheel-rail force increases significantly, and the vehicle stability index shows a nearly linear growth trend. © 2023 Science Press. All rights reserved.
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页码：135 / 140
页数：5
相关论文
共 18 条
  • [1] XU J M, WANG P, AN B Y, Et al., Damage detection of ballastless railway tracks by the impact-echo method[J], Proceedings of the Institution of Civil Engineers: Transport, 171, 2, pp. 106-114, (2018)
  • [2] GUO Yu, GAO Jianmin, SUN Yu, Et al., Mapping relationship between rail deflection of slab track and subgrade settlement[J], Journal of Southwest Jiaotong University, 52, 6, pp. 1139-1147, (2017)
  • [3] XU Qingyuan, LI Bin, ZHOU Zhihui, Study on the limited value for the uneven settlement of subgrade under CRTS-Ⅰ type slab track, China Railway Science, 33, 2, pp. 1-6, (2012)
  • [4] ZHANG X H, BURROW M, ZHOU S H., An investigation of subgrade differential settlement on the dynamic response of the vehicle-track system[J], Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 230, 7, pp. 1760-1773, (2016)
  • [5] GUO Y, ZHAI W M., Long-term prediction of track geometry degradation in high-speed vehicle-ballastless track system due to differential subgrade settlement[J], Soil Dynamics and Earthquake Engineering, 113, pp. 1-11, (2018)
  • [6] SHAN Y, ZHOU S H, ZHOU H C, Et al., Iterative method for predicting uneven settlement caused by high-speed train loads in transition-zone subgrade[J], Transportation Research Record: Journal of the Transportation Research Board, 2607, 1, pp. 7-14, (2017)
  • [7] SONG Huanping, BIAN Xuecheng, JIANG Jianqun, Et al., Correlation between subgrade settlement of high-speed railroad and train operation speed, Journal of Vibration and Shock, 31, 10, pp. 134-140, (2012)
  • [8] ZHANG Keping, SHI Guangtian, HE Zhenxing, Effects of subgrade uneven settlement on dynamic characteristics of metro type A vehicles, Journal of Vibration and Shock, 39, 17, pp. 165-170, (2020)
  • [9] CUI X H, XIAO H J., Interface mechanical properties and damage behavior of CRTSⅡ slab track considering differential subgrade settlement[J], KSCE Journal of Civil Engineering, 25, 6, pp. 2036-2045, (2021)
  • [10] XIANG Jun, LIN Shicai, YU Cuiying, Et al., Analysis of stress and deformation of slab ballastless track under effect of subgrade frost heaving−melting−settlement cycle, Journal of Central South University (Science and Technology), 50, 8, pp. 2043-2052, (2019)
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