Conversion of Love waves in a forest of trees

Autor: Maurel, Agnes, Marigo, Jean-Jacques, Pham, Kim, Guenneau, Sebastien
Přispěvatelé: Institut Langevin - Ondes et Images (UMR7587) (IL), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de la mécanique et Applications industrielles (IMSIA - UMR 9219), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Institut FRESNEL (FRESNEL), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Collaboration between Institut Langevin in Paris (Agnes Maurel), Ecole Polytechnique (Jean-Jacques Marigo) and ENSTA (Kim Pham) in Palaiseau and Institut Fresnel (Sébastien Guenneau) in Marseille
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2018, 98 (13), pp.134311. ⟨10.1103/PhysRevB.98.134311⟩
ISSN: 1098-0121
1550-235X
DOI: 10.1103/PhysRevB.98.134311⟩
Popis: This paper describes the first theoretical and numerical study of the conversion of Love waves by a forest of trees. It complements the earlier works on conversion of Rayleigh waves by a forest of trees by research groupings in ISTERRE (Philippe Roux and Philippe Guéguen), Imperial College London (Andrea Colombi and Richard Craster) and Institut Fresnel (Sébastien Guenneau). It is remarkable that Love waves in forest of trees are akin to spoof plasmon polaritons in structured metals.; International audience; We inspect the propagation of shear polarized surface waves akin to Love waves through a forest of trees of the same height atop a guiding layer on a soil substrate. An asymptotic analysis shows that the forest behaves like an infinitely anisotropic wedge with effective boundary conditions. We discover that the foliage of trees brings a radical change in the nature of the dispersion relation of these surface waves, which behave like spoof plasmons in the limit of a vanishing guiding layer, and like Love waves in the limit of trees with a vanishing height. When we consider a forest with trees of increasing or decreasing height, this hybrid “spoof Love wave” is either trapped within the trees or converted into a downward propagating bulk (shear) wave. These mechanisms of wave trapping and wave conversion appear to be robust with respect to perturbations of height or position of trees in the metawedge and with respect to three-dimensional effects such as regarding a potential change of elastic wave polarization.
Databáze: OpenAIRE
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