Enhanced seismic wave attenuation in graded seismic metamaterials with novel unit cells

Hongshan Pan, Zequn Wang, Kai Zhou

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

In recent years, seismic metamaterials (SMs) have attracted considerable attention for their capacity to manipulate seismic wave propagation. Unlike conventional seismic mitigation methods, SMs offer broader applicability and enhanced seismic energy absorption capabilities. Despite the burgeoning interest in SM research, the focus has predominantly been on the design of SM unit cells. The introduction of SM layout pattern design, a novel strategy to achieve superior wave shielding performance, has proven effective in enhancing the seismic protection of infrastructures. However, existing research on SM pattern design primarily centers on graded SMs with linear layouts, neglecting the exploration of more intricate layout patterns. To bridge this research gap, this study proposes a hierarchical design strategy that integrates a novel embedded SM unit cell design with the exploration of three graded SM layout patterns including one linear and two polynomial patterns. Subsequently, the frequency domain analysis (FDA) method is developed to assess the wave attenuation performances of the proposed SMs. The analysis results demonstrate that compared to the non-graded SM, the proposed graded SMs exhibit elevated seismic wave attenuation capabilities, suggesting potentials for advanced wave reduction.

Original languageEnglish
Title of host publicationActive and Passive Smart Structures and Integrated Systems XVIII
EditorsSerife Tol, Guoliang Huang, Xiaopeng Li, Mostafa A. Nouh, Shima Shahab, Jinkyu Yang
PublisherSPIE
ISBN (Electronic)9781510671980
DOIs
Publication statusPublished - 2024
EventActive and Passive Smart Structures and Integrated Systems XVIII 2024 - Long Beach, United States
Duration: 25 Mar 202428 Mar 2024

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12946
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceActive and Passive Smart Structures and Integrated Systems XVIII 2024
Country/TerritoryUnited States
CityLong Beach
Period25/03/2428/03/24

Keywords

  • bandgap
  • embedded unit cell
  • frequency domain analysis (FDA)
  • graded pattern
  • Seismic metamaterials (SMs)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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