Details
| Original language | English |
|---|---|
| Article number | 106592 |
| Journal | International Journal of Mechanical Sciences |
| Volume | 205 |
| Early online date | 16 Jun 2021 |
| Publication status | Published - 1 Sept 2021 |
Abstract
Broadband attenuation of low frequency acoustic waves in compact structure designs is a challenging issue, especially in the application to seismic waves. In this work, we propose a new seismic metamaterial constituted by a combination of two different attenuating structures, namely pillars above the ground and core-shell inclusions embedded in the soil. As compared to the two constituting parts, this structure enables us to broaden the bandgap while shifting it towards lower frequencies. Additionally, the analysis of the symmetry of the excited Rayleigh wave and the eigenmodes in the dispersion curves reveal that the frequency range of efficient wave attenuation in transmission is much wider than that of the corresponding bandgap. Finally, gradient combined metamaterial is designed to achieve wave attenuation in a broadband range of [4.3, 20.0] Ηz while the unit cell size keeps compact, of the order of 2 m. The results show practical and economic applications in ground surface vibration isolation to protect large infrastructures or civil engineering architectures.
Keywords
- broadband attenuation, gradient metamaterial, Rayleigh wave, seismic metamaterial
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: International Journal of Mechanical Sciences, Vol. 205, 106592, 01.09.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Broadband Rayleigh wave attenuation by gradient metamaterials
AU - Wu, Xinyue
AU - Wen, Zhihui
AU - Jin, Yabin
AU - Rabczuk, Timon
AU - Zhuang, Xiaoying
AU - Djafari-Rouhani, Bahram
N1 - Funding Information: This work is supported by the National Natural Science Foundation of China (11902223), the Shanghai Pujiang Program (19PJ1410100), the program for professor of special appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the Fundamental Research Funds for the Central Universities, the High-Level Foreign Expert Program of Tongji University and Shanghai municipal peak discipline program (2019010106).
PY - 2021/9/1
Y1 - 2021/9/1
N2 - Broadband attenuation of low frequency acoustic waves in compact structure designs is a challenging issue, especially in the application to seismic waves. In this work, we propose a new seismic metamaterial constituted by a combination of two different attenuating structures, namely pillars above the ground and core-shell inclusions embedded in the soil. As compared to the two constituting parts, this structure enables us to broaden the bandgap while shifting it towards lower frequencies. Additionally, the analysis of the symmetry of the excited Rayleigh wave and the eigenmodes in the dispersion curves reveal that the frequency range of efficient wave attenuation in transmission is much wider than that of the corresponding bandgap. Finally, gradient combined metamaterial is designed to achieve wave attenuation in a broadband range of [4.3, 20.0] Ηz while the unit cell size keeps compact, of the order of 2 m. The results show practical and economic applications in ground surface vibration isolation to protect large infrastructures or civil engineering architectures.
AB - Broadband attenuation of low frequency acoustic waves in compact structure designs is a challenging issue, especially in the application to seismic waves. In this work, we propose a new seismic metamaterial constituted by a combination of two different attenuating structures, namely pillars above the ground and core-shell inclusions embedded in the soil. As compared to the two constituting parts, this structure enables us to broaden the bandgap while shifting it towards lower frequencies. Additionally, the analysis of the symmetry of the excited Rayleigh wave and the eigenmodes in the dispersion curves reveal that the frequency range of efficient wave attenuation in transmission is much wider than that of the corresponding bandgap. Finally, gradient combined metamaterial is designed to achieve wave attenuation in a broadband range of [4.3, 20.0] Ηz while the unit cell size keeps compact, of the order of 2 m. The results show practical and economic applications in ground surface vibration isolation to protect large infrastructures or civil engineering architectures.
KW - broadband attenuation
KW - gradient metamaterial
KW - Rayleigh wave
KW - seismic metamaterial
UR - http://www.scopus.com/inward/record.url?scp=85108847497&partnerID=8YFLogxK
U2 - 10.1016/j.ijmecsci.2021.106592
DO - 10.1016/j.ijmecsci.2021.106592
M3 - Article
AN - SCOPUS:85108847497
VL - 205
JO - International Journal of Mechanical Sciences
JF - International Journal of Mechanical Sciences
SN - 0020-7403
M1 - 106592
ER -