Experiment on broadband isolation of surface wave using pillared metastructures

Extreme Mechanics Letters, Год журнала: 2024, Номер 70, С. 102180 - 102180

Опубликована: Июнь 6, 2024

Язык: Английский

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Experimental Realization of On‐Chip Surface Acoustic Wave Metasurfaces at Sub‐GHz

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Metasurfaces, consisting of subwavelength-thickness units with different wave responses, provide an innovative possible method to manipulate elastic and acoustic waves efficiently. The application metasurfaces on-chip surface (SAW) at sub-GHz frequencies requires further exploration since their functions are highly demanded in nanoelectromechanical systems (NEMS), sensing, communications, microfluid control quantum processing. Here, the experimental realization SAW is reported, gradient submicron niobium (Nb) rectangular pillars positioned on a 128°Y-cut lithium niobate (LiNbO3) substrate that operate hundreds megahertz. proposed able transmitted wavefront by designing on-demand pillar's profile distributions. Broadband subwavelength focusing effects as typical experimentally demonstrated. This study opens door for realizing diverse potential applications micro- nanoscale.

Язык: Английский

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Possible weaken of Rayleigh waves in weak porous media: Effects of surface drainage

Journal of Applied Geophysics, Год журнала: 2025, Номер unknown, С. 105710 - 105710

Опубликована: Апрель 1, 2025

Язык: Английский

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Seismic Meta‐Foundations With Imperfect Interfaces

Earthquake Engineering & Structural Dynamics, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

ABSTRACT Seismic wave isolation through layered meta‐foundations is an emerging area of research, driven by its intrinsic theoretical significance and potential practical applications. To date, the complexities associated with imperfect interfaces have often been overlooked in development analytical frameworks, which tend to prioritize simple yet effective closed‐form dispersion laws. This work provides a further step toward study under real‐world conditions incorporating effects interfaces. Our developed framework demonstrates that accounting for interface markedly enhances ultra‐low‐frequency attenuation meta‐foundations, as revealed complex analysis verified transmission finite‐sized meta‐foundations. enhancement achieved modifying stiffness mass interfaces, affects both location width frequency zones (AZs) improves within these domains. Overall, our incorporate demonstrate superior performance compared traditional offers model explores imperfections on their dynamic properties, paving way advancements design novel artificial

Язык: Английский

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Bandgap mechanism and seismic wave attenuation performance of buried seismic metamaterials with double resonators

Mechanical Systems and Signal Processing, Год журнала: 2025, Номер 231, С. 112726 - 112726

Опубликована: Апрель 10, 2025

Язык: Английский

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Dissipative locally resonant metasurfaces for low-frequency Rayleigh wave mitigation

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110233 - 110233

Опубликована: Апрель 1, 2025

Язык: Английский

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Plane Wave Attenuation in Periodic Pile Barriers with Sliding Interfaces

International Journal of Geomechanics, Год журнала: 2025, Номер 25(7)

Опубликована: Май 9, 2025

Язык: Английский

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Split-type seismic metamaterials with pseudo-surface wave weakening mechanism

Soil Dynamics and Earthquake Engineering, Год журнала: 2024, Номер 184, С. 108858 - 108858

Опубликована: Июль 18, 2024

Язык: Английский

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Broadband surface wave manipulation by periodic barriers in unsaturated soil

Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences, Год журнала: 2024, Номер 382(2278)

Опубликована: Июль 29, 2024

Periodic wave barriers have been widely used to manipulate elastic waves propagating in saturated and single-phase soil due their attenuation zone properties. However, it is difficult promote application of periodic unsaturated soils complex constitutive relationship. In this study, manipulation surface by in-filled trench has studied based on the theory. The dispersion relations a structure for are determined. mechanism evanescent revealed. Next, effects several key parameters zones comprehensively discussed. It found that particular range material parameter, attenuated over entire frequency viscosity fluid. Finally, barrier designed according field test ground vibration induced train, its performances mitigating conducted compared conducting analysis time domain. This investigation provides new insight manipulating barriers. article part theme issue ‘Current developments acoustic metamaterials science (Part 1)’.

Язык: Английский

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The 2024 phononic crystals roadmap

Journal of Physics D Applied Physics, Год журнала: 2024, Номер 58(11), С. 113001 - 113001

Опубликована: Дек. 5, 2024

Abstract Over the past 3 decades, phononic crystals experienced revolutionary development for understanding and utilizing mechanical waves by exploring interaction between structures. With significant advances in manufacture technologies from nanoscale to macroscale, attract researchers diverse disciplines study abundant directions such as bandgaps, dispersion engineering, novel modes, reconfigurable control, efficient design algorithms so on. The aim of this roadmap is present current state art, an overview properties, functions applications crystals, opinions on challenges opportunities. various perspectives cover wide topics basic property, homogenization, machine learning assisted design, topological, non-Hermitian, nonreciprocal, nanoscale, chiral, nonlocal, active, spatiotemporal, hyperuniform properties underwater acoustics, seismic wave protection, vibration noise thermal transport, sensing, acoustic tweezers, written over 40 renown experts. It also intended guide researchers, funding agencies industry identifying new prospects upcoming years.

Язык: Английский

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