Explosion Behaviors of Scaled Shallow-Buried Concrete–Rubber-Laminated Annular Metastructures: Evaluation of Shock Wave Attenuation

Abstract

The attenuation of impact inducer vibration is critical to the safety of underground protection structure, equipment and personnel. Metamaterials and metastructures show great potential in terms of sound and impact attenuation. To effectively attenuate ground shock-induced vibration of underground protective structures, scaled shallow-buried annular metastructures with concrete–rubber layered structures were proposed and constructed. Underground explosion experiments were performed to investigate the vibration attenuation effect of annular metastructures with different layered structures. It is clear in this research only annular metastructures with concrete–rubber–concrete structures like annular metastructure model B6 have the most excellent wave attenuation performances, whose rubber layer thickness must be over 6[Formula: see text]mm and hardness is 20[Formula: see text]HA. Other layered structures with rubber layer thickness of 0.3[Formula: see text]cm or with more layers cannot effectively attenuate the shock wave in this research.