Gradient index lenses for flexural waves based on thickness variations

被引：119

作者：

Climente, Alfonso ^{[1
]}

Torrent, Daniel ^{[1
]}

Sanchez-Dehesa, Jose ^{[1
]}

机构：

[1] Univ Politecn Valencia, Wave Phenomena Grp, ES-46022 Valencia, Spain

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 06期

关键词：

SCATTERING;

D O I：

10.1063/1.4893153

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This work presents a method for the realization of gradient index devices for flexural waves in thin plates. Unlike recent approaches based on phononic crystals, the present approach is based on the thickness-dependence of the dispersion relation of flexural waves, which is used to create gradient index devices by means of local variations of the plate's thickness. Numerical simulations of known circularly symmetrical gradient index lenses have been performed. These simulations have been done using the multilayer multiple scattering method and the results prove their broadband efficiency and omnidirectional properties. Finally, finite element simulations employing the full three-dimensional elasticity equations also support the validity of the designed approach. (c) 2014 AIP Publishing LLC.

引用

页数：4

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