Layered metastructure containing freely-designed local resonators for wave attenuation

Abstract

Combining periodic layered structure with three-dimensional cylindrical local resonators, a hybrid metastructure with improved wave isolation ability was designed and investigated through theoretical and numerical approaches. The metastructure is composed of periodic rubber layers and concrete layers embedded with three-dimensional resonators, which can be freely designed with multi local resonant frequencies to attenuate vibrations at required frequencies and widen the attenuation bandgap. The metastructure can also effectively attenuate seismic responses. Compared with layered rubber-based structures, the metastructure has more excellent wave attenuation effects with greater attenuation and wider bandgap.

Keywords

• Layered metastructure
• Local resonator
• Wave attenuation