Abstract
As the demand for predictions of train-induced vibrations is increasing, it is essential that adequate parameters of the railway structure are given as input in the predictions. Gathering this information can be quite time-consuming and costly, especially when predictions are required for the low-frequency emission. This article presents a procedure for deriving the effective properties of the foundation under the sleepers of a railway track from measurements taken with a heavy oscillating unit on the track. The unit consists of two masses inside a modified freight car that exert a dynamic force in the range 3–30 Hz on one of the two axles. The ratio of force applied on the axle over the resulting response measured with an accelerometer is studied. The foundation of the sleepers is modelled using a frequency-dependent complex-valued dynamic stiffness.
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Acknowledgments
The Swedish Rail Administration (Banverket) is gratefully acknowledged for their contribution to the project and crew of the RSMV. A special thanks to Mr. A. Smekal as representative of Banverket, and Mr. E. Berggren who led the work on the measuring car and provided some property values for the vehicle. The TUDelft grants program is acknowledged for granting the Junior Fellowship for 5 months to C. With. We thank Dr. B. Andréasson and the archive at Banverket Sundbyberg for their contribution on geotechnical site conditions. We would also like to thank Kumla County for allowing us to conduct the measurements on their property, as well as the reviewers for there valuable comments.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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With, C., Metrikine, A.V. & Bodare, A. Identification of effective properties of the railway substructure in the low-frequency range using a heavy oscillating unit on the track. Arch Appl Mech 80, 959–968 (2010). https://doi.org/10.1007/s00419-009-0348-4
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DOI: https://doi.org/10.1007/s00419-009-0348-4