Summary
Ground vibration from surface trains is induced by two main excitation mechanisms, due to the moving quasi-static loads and dynamic loads due to track roughness. The relative importance of these two mechanisms has been investigated using a semi-analytical model of the coupled vehicle, track and ground system. The track is represented as an infinite, layered beam resting on one or more elastic soil layers, overlying a three-dimensional half-space of ground material. The train is modelled as a multi-body system with both primary and secondary suspensions and its motion is included. The quasi-static and dynamic loads have been investigated over a wide range of conditions for locations close to the track and further away. Results are shown in terms of insertion gains for both dynamic and quasi-static components for a wide variety of conditions. It is confirmed that an assessment of the effect of a change in support stiffness should not be based on measurements too close to the track – in the case considered the distance should be at least 10 m to give representative results.
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References
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Sheng, X., Jones, C.J.C., Thompson, D.J.: A comparison of a theoretical model for quasi-statically and dynamically induced environmental vibration from trains with measurements. Journal of Sound and Vibration 267, 621–635 (2003)
Triepaischajonsak, N., Thompson, D.J., Jones, C.J.C., Ryue, J., Priest, J.A.: Ground vibration from trains: experimental parameter characterisation and validation of a numerical model. To be published in Proceedings of Institution of Mechanical Engineers, Part F
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Triepaischajonsak, N., Thompson, D.J., Jones, C.J.C., Ryue, J. (2012). Track-Based Control Measures for Ground Vibration – The Influence of Quasi-Static Loads and Dynamic Excitation. In: Maeda, T., et al. Noise and Vibration Mitigation for Rail Transportation Systems. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 118. Springer, Tokyo. https://doi.org/10.1007/978-4-431-53927-8_29
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DOI: https://doi.org/10.1007/978-4-431-53927-8_29
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-53926-1
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