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One-way interfacial waves in a flexural plate with chiral double resonators
G Carta1, D J Colquitt1, A B Movchan1
1Department of Mathematical Sciences, University of Liverpool, Liverpool L69 7ZL, UK.
Summary
Researchers developed a novel chiral plate to control flexural elastic waves. This structure enables one-way wave propagation along interfaces by using double resonators with gyroscopic spinners.
Area of Science:
- Physics
- Mechanical Engineering
- Materials Science
Background:
- Structured media offer unique wave propagation properties.
- Chirality in mechanical systems can lead to exotic wave phenomena.
- Controlling elastic waves is crucial for advanced device applications.
Purpose of the Study:
- To demonstrate a new method for controlling flexural elastic waves in chiral plates.
- To achieve one-way interfacial wave propagation using double resonators.
- To investigate the role of gyroscopic spinners in inducing and controlling chirality.
Main Methods:
- Designing a doubly periodic flexural system with double resonators.
- Incorporating gyroscopic spinners to couple flexural and rotational deformations.
- Analyzing wave propagation at interfaces separating domains with opposite gyroscope spin directions.
Main Results:
- The chiral plate structure supports one-way flexural wave propagation localized at interfaces.
- Directional control of wave propagation is achieved by tuning gyricity at a fixed excitation frequency.
- Wave propagation direction can be reversed by altering the excitation frequency for a constant gyricity.
Conclusions:
- The proposed double resonator system effectively controls flexural elastic wave propagation direction.
- Gyroscopic spinners are key to inducing chirality and enabling directional wave control.
- This approach offers a new pathway for designing advanced elastic wave devices.
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