Year: 2025
Type: article
Abstract: Controlling seismic wave propagation to protect critical infrastructure through metamaterials has emerged as a frontier research topic. The narrow bandgap and heavy weight of a resonant seismic metamaterial(SM) limit its application for securing buildings. In this research, we first develop a two-dimensional(2D) seismic metamaterial with gammadion-shaped chiral inclusions achieving a high relative bandgap width of 77.34%. And its effective mass density is investigated to clarify the generation mechanism of bandgap due to negative mass density between 12.53 - 28.33 Hz. Then, the gammadion-shaped pillars are introduced on a half-space to design a three-dimensional(3D) chiral SM to attenuate Rayleigh waves within a wider low-frequency range. Further, time-frequency analyses for real seismic waves and scaled experimental tests confirm the practical feasibility of the 3D SM. Compared with common resonant SMs, our chiral configurations offer a wider attenuation zone and lighter weight.
Source: Crystals
Authors: Yawen Shen, Boyang Zhang, Pengcheng Ma, Qiujiao Du, Hongwu Yang, Pai Peng, Fengming Liu
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,534
OpenAlex ID: W4417453176