Flat lens effect on seismic waves propagation in the subsoil

We show that seismic energy simulated by an artificial source that mainly propagates Rayleigh surface waves, is focused in structured soil made of a grid of holes distributed in the ground. We carry out large-scale field tests with a structured soil made of a grid consisting of cylindrical and verti...

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Autores principales: Brûlé, Stéphane, Javelaud, Emmanuel H., Enoch, Stefan, Guenneau, Sébastien
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5741748/
https://www.ncbi.nlm.nih.gov/pubmed/29273798
http://dx.doi.org/10.1038/s41598-017-17661-y
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author Brûlé, Stéphane
Javelaud, Emmanuel H.
Enoch, Stefan
Guenneau, Sébastien
author_facet Brûlé, Stéphane
Javelaud, Emmanuel H.
Enoch, Stefan
Guenneau, Sébastien
author_sort Brûlé, Stéphane
collection PubMed
description We show that seismic energy simulated by an artificial source that mainly propagates Rayleigh surface waves, is focused in structured soil made of a grid of holes distributed in the ground. We carry out large-scale field tests with a structured soil made of a grid consisting of cylindrical and vertical holes in the ground and a low frequency artificial source (<10 Hz). This allows the identification of a distribution of energy inside the grid, which can be interpreted as the consequence of a dynamic anisotropy akin to an effective negative refraction index. Such a flat lens reminiscent of what Veselago and Pendry envisioned for light opens avenues in seismic metamaterials to counteract partially or totally the most devastating components of seismic signals.
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spelling pubmed-57417482018-01-03 Flat lens effect on seismic waves propagation in the subsoil Brûlé, Stéphane Javelaud, Emmanuel H. Enoch, Stefan Guenneau, Sébastien Sci Rep Article We show that seismic energy simulated by an artificial source that mainly propagates Rayleigh surface waves, is focused in structured soil made of a grid of holes distributed in the ground. We carry out large-scale field tests with a structured soil made of a grid consisting of cylindrical and vertical holes in the ground and a low frequency artificial source (<10 Hz). This allows the identification of a distribution of energy inside the grid, which can be interpreted as the consequence of a dynamic anisotropy akin to an effective negative refraction index. Such a flat lens reminiscent of what Veselago and Pendry envisioned for light opens avenues in seismic metamaterials to counteract partially or totally the most devastating components of seismic signals. Nature Publishing Group UK 2017-12-22 /pmc/articles/PMC5741748/ /pubmed/29273798 http://dx.doi.org/10.1038/s41598-017-17661-y Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Brûlé, Stéphane
Javelaud, Emmanuel H.
Enoch, Stefan
Guenneau, Sébastien
Flat lens effect on seismic waves propagation in the subsoil
title Flat lens effect on seismic waves propagation in the subsoil
title_full Flat lens effect on seismic waves propagation in the subsoil
title_fullStr Flat lens effect on seismic waves propagation in the subsoil
title_full_unstemmed Flat lens effect on seismic waves propagation in the subsoil
title_short Flat lens effect on seismic waves propagation in the subsoil
title_sort flat lens effect on seismic waves propagation in the subsoil
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5741748/
https://www.ncbi.nlm.nih.gov/pubmed/29273798
http://dx.doi.org/10.1038/s41598-017-17661-y
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