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10 April 2018 Tailoring vibration mode of a uniform beam by acoustic metamaterial synthesis
Jiawen Xu, Shilong Li, J. Tang
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Proceedings Volume 10595, Active and Passive Smart Structures and Integrated Systems XII; 105952L (2018) https://doi.org/10.1117/12.2296781
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States
Abstract
Acoustic metamaterials have attractive potential in elastic wave attenuation and wave guiding over specific frequency ranges. In this research, we apply acoustic metamaterial into the manipulation of stationary wave in a finite beam, i.e., tailoring vibration modes of the structure. Rather than geometrical modification, we demonstrate that vibration modes can be adjusted by combing the resonance and bandgap characteristics of piezoelectric metamaterial. For instance, it’s shown that new vibration modes can be created while the region with excitation applied has minimum displacement. Furthermore, it’s illustrated that resonance region of the metamaterial beam can be arbitrarily assigned due to the adaptiveness of the piezoelectric metamaterial beam. The analytical investigations are confirmed with finite element simulations.
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Jiawen Xu, Shilong Li, and J. Tang "Tailoring vibration mode of a uniform beam by acoustic metamaterial synthesis", Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 105952L (10 April 2018); https://doi.org/10.1117/12.2296781
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KEYWORDS
Metamaterials
Acoustics
Inductance
Transducers
Modal analysis
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