Rayleigh waves isolation based on metamaterials surface
Linyun Zhou, Shui Wan
Abstract
Elastic metamaterials (EMMs) can attenuate surface Rayleigh waves effectively, However, it still hard to put EMMs in practical engineering applications. To overcome this limitation, specific combinations of effective parameters for Rayleigh waves isolation have been determined based on propagation behavior of Rayleigh waves in the semi-infinite EMM. Then, unit cell with negative hybrid bands has been designed to satisfy the requirements of effective parameters. Finally, a new type of metamaterial surface (MMS) was proposed to isolate Rayleigh waves, numerical results show that the peak value of acceleration on surface with proposed MMS can be decreased by 97.2% under seismic wave.
Topics & Concepts
MetamaterialRayleigh waveIsolation (microbiology)AcousticsSurface (topology)Surface waveStructural engineeringMaterials scienceEngineeringOpticsPhysicsGeometryMathematicsMicrobiologyBiologyAcoustic Wave Phenomena ResearchSeismic Waves and AnalysisUnderwater Acoustics Research