Опубликована: Янв. 1, 2024
Язык: Английский
Thin-Walled Structures, Год журнала: 2024, Номер 197, С. 111609 - 111609
Опубликована: Янв. 17, 2024
Язык: Английский
Процитировано
13
Earthquake Engineering & Structural Dynamics, Год журнала: 2024, Номер 53(13), С. 4099 - 4113
Опубликована: Авг. 13, 2024
Abstract Vibration isolation metamaterial barrier has been extensively studied in mitigating the damage induced by vibration, while a deeper understanding of vibration characteristics based on laboratory experiments is still lacking. In this work, locally resonant proposed, and large‐scale experiment was first designed to investigate mechanism proposed barrier. The assembled arraying 5 × resonators. To better explain observations unveil underlying mechanism, COMSOL Multiphysics also employed simulate experiment. Subsequently, effect quantitatively analyzed analyzing acceleration amplitude reduction spectrum (ARS) ground surface. discussed monitoring field around results indicate that two significant attenuation domains are observed, which first‐order second‐order vertical resonance frequencies metamaterial. Another experimental scheme simultaneously monitored mass block bottom resonators implemented resonator. energy distribution resonator found depend significantly frequency. When frequency lower than certain frequency, dominant. Otherwise, geometric scattering investigated provided an effective solving path for isolating low‐frequency vibration.
Язык: Английский
Процитировано
6
Опубликована: Янв. 1, 2025
To effectively attenuate low-frequency Rayleigh waves and achieve energy localization, this study proposes a resonant topological metasurface based on the regional folding approach, further investigates its manipulation mechanisms for in homogeneous layered elastic half-spaces. aim, we develop general analytical framework proposed through thin-layer method (TLM) multiple scattering theory. Using framework, spatial modulation frequency spectrum is calculated, revealing existence of bandgap (TBG). The eigenfield analysis provides detailed insights into edge modes properties unit cells. A topologically protected interface mode (TPIM) generated at between two domains composed different units, exhibiting significant localization. Further indicates that exhibits dual Rayleigh-to-Rayleigh backscattering Rayleigh-to-bulk conversion within TBG, resulting enhanced wave isolation. Moreover, demonstrates strong robustness against stratification half-space, with TPIM unaffected by higher-order modes. It maintains great localization excellent vibration attenuation performance TBG half-space. This offers promising new avenues mitigation harvesting.
Язык: Английский
Процитировано
0
Soil Dynamics and Earthquake Engineering, Год журнала: 2025, Номер 194, С. 109354 - 109354
Опубликована: Март 9, 2025
Язык: Английский
Процитировано
0
Engineering Structures, Год журнала: 2025, Номер 332, С. 120093 - 120093
Опубликована: Март 13, 2025
Язык: Английский
Процитировано
0
International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110233 - 110233
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
International Journal of Geomechanics, Год журнала: 2025, Номер 25(7)
Опубликована: Май 9, 2025
Язык: Английский
Процитировано
0
Physica Scripta, Год журнала: 2025, Номер 100(6), С. 065982 - 065982
Опубликована: Май 28, 2025
Abstract
Tunable
metasurfaces
show
promising
applications
in
modulating
flexural
waves,
but
existing
research
lacks
effective
modulation
of
multidirectional
waves.
In
this
paper,
a
tunable
radial
metasurface
is
proposed,
which
able
to
manipulate
the
waves
achieve
various
functions,
especially
control
single-focus
and
multi-focus
focusing
positions
inside
metasurface.
The
consists
arc
sub-units,
height
slider
sub-units
can
be
adjusted
obtain
phase
shift
covering
range
Язык: Английский
Процитировано
0
Journal of Applied Physics, Год журнала: 2024, Номер 135(13)
Опубликована: Апрель 1, 2024
The time-modulated active medium with linear independent frequency conversion method has been demonstrated to enable wave orientation and reconstruction. However, due the symmetric scattering field, this technique requires intricate microcircuit designs. To overcome limitation, paper proposes a tunable piezoelectric metasurface based on acoustic black holes (ABHs) redirect flexural reflections. system can convert an incident into reflected of any direction frequency. This is accomplished through time modulation sensing signal, which breaks constraints Snell’s law inherent in traditional designs insensitive amplitude. coupling ABH damping mechanism allows for while also eliminating influence second harmonic reflection field simplifying circuit. In addition, demonstrates arbitrary angle reflection, focusing, beam splitting, wave. By improving flexibility elastic manipulation, introduces new approach control waves provides design that be employed variety applications ranging from vibration protection engineering structures evaluation.
Язык: Английский
Процитировано
1
Опубликована: Янв. 1, 2024
Язык: Английский
Процитировано
0