Elastic Wave Control Beyond Band-Gaps: Shaping the Flow of Waves in Plates and Half-Spaces with Subwavelength Resonant Rods

The wave propagation attenuation in low frequencies by using piezoelectric elastic metamaterials has been developed in recent years. These piezoelectric structures exhibit abnormal properties, different from those found in nature, through the artificial design of the topology or exploring the shunt circuit parameters. In this study, the wave propagation in a 1-D elastic metamaterial rod with periodic arrays of shunted piezo-patches is investigated. This piezoelectric metamaterial rod is capable of filtering the propagation of longitudinal elastic waves over a specified range of frequency, called band gaps. The complex dispersion diagrams are obtained by the extended plane wave expansion (EPWE) and wave finite element (WFE) approaches. The comparison between these methods shows good agreement. The Bragg-type and locally resonant band gaps are opened up. The shunt circuits influence significantly the propagating and the evanescent modes. The results can be used for elastic wave attenuation using piezoelectric periodic structures.

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Multistable metamaterial on elastic foundation enables tunable morphology for elastic wave control

Journal of Applied Physics ◽

10.1063/1.5145324 ◽

2020 ◽

Vol 127 (22) ◽

pp. 225104 ◽

Cited By ~ 1

Author(s):

Vinod Ramakrishnan ◽

M. J. Frazier

Keyword(s):

Elastic Wave ◽

Elastic Foundation ◽

Tunable Morphology ◽

Wave Control

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Structural design of a piezoelectric meta-structure with nonlinear electrical Bi-link networks for elastic wave control

International Journal of Mechanical Sciences ◽

10.1016/j.ijmecsci.2020.105730 ◽

2020 ◽

Vol 181 ◽

pp. 105730 ◽

Cited By ~ 2

Author(s):

Bin Bao ◽

Mickaël Lallart ◽

Daniel Guyomar

Keyword(s):

Elastic Wave ◽

Structural Design ◽

Wave Control

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Vibration Attenuation Optimization in a Rod With Different Periodic Piezoelectric Shunting Configurations

10.20855/ijav.2021.26.31751 ◽

2021 ◽

Vol 26 (3) ◽

pp. 212-220

Author(s):

Hui Guo ◽

Yaru Zhang ◽

Tao Yuan ◽

Pei Sun Qian ◽

Qian Cheng ◽

...

Keyword(s):

Genetic Algorithm ◽

Wave Propagation ◽

Numerical Model ◽

Elastic Wave ◽

Vibration Control ◽

Wave Attenuation ◽

Broad Band ◽

Band Gaps ◽

Attenuation Constant ◽

Vibration Attenuation

Wave propagation control in piezoelectric meta-materials has been extensively investigated in recent years due to its significant effects on elastic wave attenuation. In this work, a novel piezoelectric meta-material rod connected to three configurations of shunting circuits is proposed for broad band gaps. The numerical model is constructed to predict the band gap, attenuation constant, and vibration transmission. For larger attenuation within the band gaps, the shunting circuit parameters are optimized with a genetic algorithm. The result shows that the structure with the optimized parameters provides prominent vibration control ability. Both the attenuation constant and the width of the band gaps are enlarged.

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