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Open AccessArticle
The Characteristics of Long-Wave Irregularities in High-Speed Railway Vertical Curves and Method for Mitigation
by
Laiwei Jiang
Laiwei Jiang 1,
Yangtenglong Li
Yangtenglong Li 2,3,4,
Yuyuan Zhao
Yuyuan Zhao 5 and
Minyi Cen
Minyi Cen 1,*
1
Faculty of Geosciences and Engineering, Southwest Jiaotong University, Chengdu 611756, China
2
Key Laboratory of High-Speed Railway Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
3
Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
4
College of Earth and Planetary Sciences, Chengdu University of Technology, Chengdu 610059, China
5
Track Maintenance Department, China Railway Guangzhou Group Co., Ltd., Guangzhou 510088, China
*
Author to whom correspondence should be addressed.
Sensors 2024, 24(13), 4403; https://doi.org/10.3390/s24134403 (registering DOI)
Submission received: 9 June 2024
/
Revised: 4 July 2024
/
Accepted: 4 July 2024
/
Published: 7 July 2024
Abstract
Track geometry measurements (TGMs) are a critical methodology for assessing the quality of track regularities and, thus, are essential for ensuring the safety and comfort of high-speed railway (HSR) operations. TGMs also serve as foundational datasets for engineering departments to devise daily maintenance and repair strategies. During routine maintenance, S-shaped long-wave irregularities (SLIs) were found to be present in the vertical direction from track geometry cars (TGCs) at the beginning and end of a vertical curve (VC). In this paper, we conduct a comprehensive analysis and comparison of the characteristics of these SLIs and design a long-wave filter for simulating inertial measurement systems (IMSs). This simulation experiment conclusively demonstrates that SLIs are not attributed to track geometric deformation from the design reference. Instead, imperfections in the longitudinal profile’s design are what cause abrupt changes in the vehicle’s acceleration, resulting in the measurement output of SLIs. Expanding upon this foundation, an additional investigation concerning the quantitative relationship between SLIs and longitudinal profiles is pursued. Finally, a method that involves the addition of a third-degree parabolic transition curve (TDPTC) or a full-wave sinusoidal transition curve (FSTC) is proposed for a smooth transition between the slope and the circular curve, designed to eliminate the abrupt changes in vertical acceleration and to mitigate SLIs. The correctness and effectiveness of this method are validated through filtering simulation experiments. These experiments indicate that the proposed method not only eliminates abrupt changes in vertical acceleration, but also significantly mitigates SLIs.
Share and Cite
MDPI and ACS Style
Jiang, L.; Li, Y.; Zhao, Y.; Cen, M.
The Characteristics of Long-Wave Irregularities in High-Speed Railway Vertical Curves and Method for Mitigation. Sensors 2024, 24, 4403.
https://doi.org/10.3390/s24134403
AMA Style
Jiang L, Li Y, Zhao Y, Cen M.
The Characteristics of Long-Wave Irregularities in High-Speed Railway Vertical Curves and Method for Mitigation. Sensors. 2024; 24(13):4403.
https://doi.org/10.3390/s24134403
Chicago/Turabian Style
Jiang, Laiwei, Yangtenglong Li, Yuyuan Zhao, and Minyi Cen.
2024. "The Characteristics of Long-Wave Irregularities in High-Speed Railway Vertical Curves and Method for Mitigation" Sensors 24, no. 13: 4403.
https://doi.org/10.3390/s24134403
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