電気・構造連成振動系から成るメタマテリアルの共振点変化による制振性への影響

抄録

　Acoustic metamaterials are artificial materials designed to passively attenuate waves in the resonant frequency range by periodically placing resonant structures in the material that are sufficiently smaller than the propagating wavelength. In general, acoustic metamaterial research often suppresses the propagation of elastic waves by means of mechanical local resonant structures. In this study, however, the local resonant structure is replaced by an electrical system to create a coupled electrical/structural vibration system to reduce vibration near the resonant frequency. Numerical simulations using the finite element method were performed to investigate the change in the vibration of elastic waves propagating through a plate in the ultrasonic range when the resonance frequency of the local resonance structure of the electrical system is changed.