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Numerical study on dynamic responses of a train-track-subgrade system in permafrost regions under seasonal variation
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DOI：10.1016/j.coldregions.2026.104979.png)
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Abstract
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• We develop a numerical model of a train-track-permafrost subgrade system to reveal the dynamic interactions. • The proposed model is validated using field monitoring data. • The dominant vibration modes of the system across different seasons are revealed in both the time and frequency domains. • The uneven stiffness of permafrost subgrade alters the load transmission pathways compared with unfrozen subgrades.
Keywords:
train-track-subgrade system
permafrost
seasonal variation
dynamic response
vibration modes
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