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• W2960933224 abstract "To estimate the rail axial force of high-speed railway ballastless track, the reasonable index without complex measuring or error correction process is proposed. Taking the ballastless track structure in high-speed railway as the research object, the wave motion of periodic ballastless track is studied using the wave finite element method. It is found that some standing wave modes are linearly correlated with the rail axial force and thus can be considered as the basic indices for rail axial force estimation. A further in situ experiment according to the modal test method is performed and the feasibility of different wave modes for estimating rail axial force is discussed. Experiment results show that the lateral wave mode coincides well with the theoretical result while there is a large difference for the vertical wave mode. To explicate the difference, the temperature-dependent properties of the fastening are tested additionally. Parametric analysis shows that the frequency shift of vertical wave mode is greatly affected by the fastening temperature-dependent characteristics including the rail pad, elastic pad, and fastener clamping force, while the frequency shift of lateral wave mode is mainly determined by the rail axial force." @default.
• W2960933224 created "2019-07-23" @default.
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• W2960933224 date "2019-07-17" @default.
• W2960933224 modified "2023-10-15" @default.
• W2960933224 title "Estimation of Rail Axial Force in High-Speed Railway Ballastless Track Based on Wave Modes" @default.
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• W2960933224 doi "https://doi.org/10.1155/2019/4329830" @default.
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