Vibration attenuation of meta-mortar with spring-mass resonators
San-feng Liu, Hailong Chen, Yang Liu, Huguang He, Xiyue An, Fengnian Jin, Hualin Fan
Abstract
Metamaterial based on local resonance has excellent vibration attenuation ability in low frequency. In this research, an attempt was performed to make meta-mortar with spring-mass resonators to attenuate vibration and shock hazards. Single-spring-mass resonators and dual-spring-mass resonators were designed and made using lead or aluminum blocks and SWPB springs encased by PMMA (polymethyl methacrylate) or aluminum frames. These resonators were placed into mortar blocks to make meta-mortar specimens. Vibration attenuation effect was investigated by sweeping vibration with frequency from 50 Hz to 2000 Hz. All these meta-mortar blocks exhibit excellent vibration attenuation ability in the designed band gaps. With dual-spring-mass resonators, meta-mortar blocks have two distinct vibration attenuation bands.