Broadband Rayleigh wave attenuation by gradient metamaterials

Wu, Xinyue; Wen, Zhihui; Jin, Yabin; Rabczuk, Timon; Zhuang, Xiaoying; Djafari‐Rouhani, Bahram

doi:10.1016/j.ijmecsci.2021.106592

Cited by 60 publications

(12 citation statements)

References 45 publications

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“…[13][14][15] The aforementioned strategies for SM design primarily concentrate on unit cell design to achieve broader bandgaps. An innovative approach, graded SM design, 16 transcends traditional unit cell design by extending SM design to higher dimensions. By deploying unit cells in accordance with specified graded tendencies (e.g., varying heights/lengths of resonators) in a three-dimensional space, enhanced wave attenuation capabilities may be attained.…”

Section: Introductionmentioning

confidence: 99%

“…To quantitatively assess the performance of nonperiodic SMs, frequency domain analysis (FDA) is employed to calculate the transmission, facilitating effective performance evaluation of graded SMs. While augmented seismic wave attenuation has been reported, previous investigations into graded SM design have primarily focused on linearly graded patterns, with FDA used to quantify wave attenuation capabilities, [16][17][18] lacking further explorations on more complex graded SMs.…”

Section: Introductionmentioning

confidence: 99%

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

Pan,

Wang,

Zhou

2024

Active and Passive Smart Structures and Integrated Systems XVIII

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Pan,

Wang,

Zhou

2024

Active and Passive Smart Structures and Integrated Systems XVIII

View full text Add to dashboard Cite

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“…In addition, for better integration of SMs in the foundation of a building for seismic isolation purposes, Yan et al [35] proposed a 2D periodic foundation constituted of ductile cast iron, supper soft rubber and reinforced concrete, while Casablanca et al [36] designed a periodic mass-in-mass foundation placed underneath buildings. To obtain wider bandgaps, the pillars with different kinds of structures [28,[37][38][39][40][41][42], and the "rainbow trapping effects" [8,29,34,[43][44][45][46][47] were utilized. However, the ultra-low-frequency (< 2 Hz) bandgaps are hard to obtain by using small-size structures.…”

Section: Introductionmentioning

confidence: 99%

Seismic metamaterials: Generating low-frequency bandgaps induced by inertial amplification

Zeng

Cao

Wan

et al. 2022

International Journal of Mechanical Sciences

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“…When considering the optimization of attenuation range, the gradient effect [ 58 , 59 ] and the rainbow trapping [ 60 , 61 ] have been proposed and validated in order to achieve a wider range of wave attenuation or vibration energy absorption. It is also noteworthy that Muhammad and Lim et al [ 62 , 63 , 64 ] introduced embedded or semi-embedded multi-resonators, which made an enlightening contribution to the realization of broadband seismic Rayleigh wave attenuation.…”

Section: Introductionmentioning

confidence: 99%

Unlocking Novel Ultralow-Frequency Band Gap: Assembled Cellular Metabarrier for Broadband Wave Isolation

et al. 2022

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Admittedly, the design requirements of compactness, low frequency, and broadband seem to constitute an impossible trinity, hindering the further development of elastic metamaterials (EMMs) in wave shielding engineering. To break through these constraints, we propose theoretical combinations of effective parameters for wave isolation based on the propagation properties of Lamb waves in the EMM layer. Accordingly, we design compact EMMs with a novel ultralow−frequency bandgap, and the role of auxeticity in the dissociation between the dipole mode and the toroidal dipole mode is clearly revealed. Finally, under the guidance of the improved gradient design, we integrate multiple bandgaps to assemble metamaterial barriers (MMBs) for broadband wave isolation. In particular, the original configuration is further optimized and its ultralow−frequency and broadband performance are proven by transmission tests. It is foreseeable that our work will provide a meaningful reference for the application of the new EMMs in disaster prevention and protection engineering.

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Broadband Rayleigh wave attenuation by gradient metamaterials

Cited by 60 publications

References 45 publications

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

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

Seismic metamaterials: Generating low-frequency bandgaps induced by inertial amplification

Unlocking Novel Ultralow-Frequency Band Gap: Assembled Cellular Metabarrier for Broadband Wave Isolation

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