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One-way interfacial waves in a flexural plate with chiral double resonators

Carta, G, Colquitt, DJ, Movchan, AB, Movchan, N and Jones, IS (2019) One-way interfacial waves in a flexural plate with chiral double resonators. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 378 (2162). ISSN 1364-503X

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Abstract

In this paper, we demonstrate a new approach to control flexural elastic waves in a structured chiral plate. The main focus is on creating one-way interfacial wave propagation at a given frequency by employing double resonators in a doubly periodic flexural system. The resonators consist of two beams attached to gyroscopic spinners, which act to couple flexural and rotational deformations, hence inducing chirality in the system. We show that this elastic structure supports one-way flexural waves, localized at an interface separating two sub-domains with gyroscopes spinning in opposite directions, but with otherwise identical properties. We demonstrate that a special feature of double resonators is in the directional control of wave propagation by varying the value of the gyricity, while keeping the frequency of the external time-harmonic excitation fixed. Conversely, for the same value of gyricity, the direction of wave propagation can be reversed by tuning the frequency of the external excitation.

Item Type: Article
Uncontrolled Keywords: Science & Technology; Multidisciplinary Sciences; Science & Technology - Other Topics; flexural waves; chirality; gyroscopic spinners; one-way interfacial waves; double resonators; LOCALIZATION; BEAM; EDGE; TRANSMISSION; BLOCH
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Maritime & Mechanical Engineering
Publisher: Royal Society, The
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Date Deposited: 17 Mar 2020 10:11
Last Modified: 17 Mar 2020 10:15
DOI or Identification number: 10.1098/rsta.2019.0350
URI: http://researchonline.ljmu.ac.uk/id/eprint/12511

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