Investigation on the Dynamic Characteristics of Track Slab with the Influence of Rail Corrugation
Publication: Journal of Infrastructure Systems
Volume 29, Issue 3
Abstract
Rail corrugation, a common defect of rails, causes a high frequency self-oscillation effect in track slabs when there is an external load. In order to analyze the influence of multi-scales of rail corrugation on the dynamic characteristics of track slab under an external moving load, the relationship between the nature vibration modes of a single track slab and the resonance of the wheel-rail at different wavelengths, wave depths, and velocities is investigated. The results clearly show that the vertical acceleration of the track slab is the largest when the wavelength is 60 mm and the wave depth is 0.5 mm. At this point, the peak frequency of the track slab approaches its natural frequency. The maximum vertical acceleration decreases as velocity increases. The resonance effect between the track slab and the vehicle body will trigger a side-frequency phenomenon in the track slab frequency domain diagram. The indicator margin factor (MF) is more sensitive when the wavelength and wave depth are different, and the MF and peak-to-peak value (PPV) are more sensitive when the vehicle velocity is different. They can be used to judge the degree of influence of different scales of rail corrugation on the vertical acceleration of track slab.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research was supported by National Natural Science Foundation of China (No. 51975038), Natural Science Foundation of Beijing Municipal (No. KZ202010016025), Natural Science Foundation of Beijing Municipality (Grant No. 3214042), and BUCEA Doctor Graduate Scientific Research Ability Improvement Project (DG2021005). The authors gratefully acknowledge the support.
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Information & Authors
Information
Published In
Journal of Infrastructure Systems
Volume 29 • Issue 3 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Apr 14, 2022
Accepted: Jan 19, 2023
Published online: May 23, 2023
Published in print: Sep 1, 2023
Discussion open until: Oct 23, 2023
ASCE Technical Topics:
- Continuum mechanics
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering mechanics
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Fluid velocity
- Hydrologic engineering
- Infrastructure
- Motion (dynamics)
- Moving loads
- Rail transportation
- Railroad tracks
- Slabs
- Solid mechanics
- Structural dynamics
- Structural engineering
- Structural members
- Structural systems
- Transportation engineering
- Vibration
- Water and water resources
- Wave velocity
- Wavelength
- Waves (mechanics)
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