Broadband Rayleigh wave attenuation by ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Broadband Rayleigh wave attenuation by gradient metamaterials
Auteur(s) :
Wu, Xinyue [Auteur]
Wen, Zhihui [Auteur]
School of Aerospace Engineering and Applied Mechanics
Jin, Yabin [Auteur]
Tongji University
Rabczuk, Timon [Auteur]
Bauhaus-Universität Weimar
Zhuang, Xiaoying [Auteur]
Djafari-Rouhani, Bahram [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Wen, Zhihui [Auteur]
School of Aerospace Engineering and Applied Mechanics
Jin, Yabin [Auteur]
Tongji University
Rabczuk, Timon [Auteur]
Bauhaus-Universität Weimar
Zhuang, Xiaoying [Auteur]
Djafari-Rouhani, Bahram [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Titre de la revue :
International Journal of Mechanical Sciences
Pagination :
106592
Éditeur :
Elsevier
Date de publication :
2021-09
ISSN :
0020-7403
Mot(s)-clé(s) en anglais :
broadband attenuation
gradient metamaterial
Rayleigh wave
seismic metamaterial
gradient metamaterial
Rayleigh wave
seismic metamaterial
Discipline(s) HAL :
Sciences de l'ingénieur [physics]
Résumé en anglais : [en]
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 ...
Lire la suite >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.Lire moins >
Lire la suite >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.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :