Local resonance type photonic crystal primitive cell

Abstract

The utility model provides a local resonance type phononic crystal primitive cell which comprises a silicon rubber base body serving as an outer ring, a steel scatterer is arranged in an inner cavity of the silicon rubber base body, and the steel scatterer and the silicon rubber base body are connected and fixed through a soft material wrapping layer. The four spring mass subsystems are nested in the steel scattering body; a soft material wrapping layer is arranged on the side wall of the inner cavity of the silicone rubber base body. According to the utility model, a plurality of complete and directional band gaps in a low-frequency range can be effectively formed, and low-frequency elastic waves are effectively inhibited; the hollow and height difference design is adopted among the external silicon rubber base body, the steel scatterer and the spring mass subsystem, so that the vibration damping material has a sufficient deformation space to play a vibration damping role; the steel scatterer, the spring mass subsystem and other structures ensure that the anti-vibration pad has an enough supporting effect, band gap regulation and control of the local resonance type photonic crystal can be effectively achieved through material selection flexibility, and low-frequency vibration control of different frequency bands is achieved.