Lamprea-Pineda, A.C., Castanheira-Pinto, A., Costa, P.A. et al. (3 more authors) (2023) Railway track structural dynamics via periodic approaches. In: COMPDYN 2023 Proceedings. COMPDYN 2023: 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, 12-14 Jun 2023, Athens, Greece.
Abstract
Periodicity can be defined as the repetitive character of a structure's features. In railway track systems, periodicity can be found in the geometrical and material properties in the train passage direction. For example, the repeating pattern of sleepers, rail seats or slab track units. To take advantage of this, this paper employs the direct periodic method, a novel numerical method which exploits the invariant nature of the railway track structure. Instead of simulating the total track domain, the direct periodic method studies a discrete portion of the track, often known as the reference cell, which captures its repetitive pattern and provides the total track response. First, the cell response is obtained by enforcing compatibility conditions within its system of equations of motion in the wavenumber-frequency domain. Then, the total space response is retrieved by replicating the cell's solution via a combination of periodic conditions and Fourier transformations. It is combined with perfectly matched layers to simulate infinite depth soil boundary conditions. Thus, this paper employs the direct periodic method in combination with perfectly matching layers to analyze track-ground dynamic interaction.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | Periodic Modelling, Ballasted Track, Vibration Problems, Vibration Modes, Wave Propagation, Frequency Response |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Feb 2024 11:39 |
Last Modified: | 15 Feb 2024 11:39 |
Published Version: | https://2023.compdyn.org/proceedings/ |
Status: | Published |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:209192 |