2024 Locally resonant sonic materials insite:cnki

Locally resonant sonic materials insite:cnki

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Witrynafrom such localized resonant structures behave as a material with effective negative elastic constants and a total wave reßector within certain tunable sonic frequency … WitrynaSonic crystals are artificial structures consisting of a periodic array of acoustic scatterers embedded in a homogeneous matrix material, with a usually large impedance …

Wavenumber-space band clipping in nonlinear periodic structures

Witryna8 sty 2024 · The locally resonant units are attached periodically on the rail, forming a new locally resonant phononic crystal structure. ... Locally resonant sonic materials [J]. Science, 2000, 289(5485): 1734–1736. Article Google Scholar ZHENG Ling, LI Yi, BAZ A. Attenuation of wave propagation in a novel periodic structure [J]. Journal of … Witryna8 wrz 2000 · Fig. 3. Measured amplitude transmission (solid circles; the solid line is a guide to the eye) through a 2.1-cm slab of composite material containing 48 volume … exchange residential newcastle

Sound Absorption of Locally Resonant Sonic Materials

WitrynaUltrawide Bandgap Locally Resonant Sonic Materials-Oblique incidence properties of locally resonant sonic materials with resonance and Bragg scattering effects-Multiple slow waves in metaporous layers for broadband sound absorption-Recent citations Hybrid meta-structure for broadband waterborne sound absorption Haibin Yang et al- WitrynaA locally resonant sonic material (LRSM) is an elastic matrix containing a periodic arrangement of identical local resonators (LRs), which can reflect strongly near their … Witryna8 wrz 2000 · Note the expanded scale near the G point. - "Locally resonant sonic materials" Fig. 1. (A) Cross section of a coated lead sphere that forms the basic … exchange reservation azure

Locally Resonant Sonic Materials - NASA/ADS

Locally resonant sonic materials - PubMed

WitrynaThe locally resonant sonic material (LRSM) is an artiﬁcial metamaterial that can block underwater sound. The low-frequency insulation performance of LRSM can be … Witrynamaterials. [1 3] The fo cus has b een extended to the study of comp osite m ultipla y er panels with phononic-crystal c haracteristics. [4 19] This is of in terest for ap-plications in lo w frequency barriers. [20; 21] The lo cally resonan t sonic material (LRSM) re-searc h area has been op ened in the eld of phononic bandgap materials since ... bsod on shutdownWitryna8 wrz 2000 · Abstract. We have fabricated sonic crystals, based on the idea of localized resonant structures, that exhibit spectral gaps with a lattice constant two orders of … bsod pdc watchdog timeout

"Witryna2 lut 2011 · Matryoshka locally resonant sonic crystal. The results of numerical modeling of sonic crystals with resonant array elements are reported. The investigated resonant elements include plain slotted cylinders as well as their various combinations, in particular, Russian doll or Matryoshka configurations. The acoustic band structure … " - Locally resonant sonic materials insite:cnki

Locally resonant sonic materials insite:cnki

Broadband locally resonant sonic shields - AIP Publishing

WitrynaSonic crystals are artificial structures consisting of a periodic array of acoustic scatterers embedded in a homogeneous matrix material, with a usually large impedance mismatch between the two materials. ... Modelling and simulation of acoustic wave propagation in locally resonant sonic materials Ultrasonics. 2004 Apr;42(1-9):231-5. doi: 10. ... Witryna22 gru 2003 · We demonstrate a class of sonic shield materials based on the principle of locally resonant (LR) microstructures. Each local resonator is found to vibrate …

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Witryna1.5 Multi-layer locally resonant structures In layered LRS arrangements the layers are elastically connected in series, which can be represented in one dimension by a spring element known as the ...

Witryna23 maj 2014 · The model of acoustic metamaterials lens mainly uses the two-dimensional three components of locally resonant phononic crystal. The unit cell of these lens has a lead column with radius of 0.0005 m around the annular rubber with radius of 0.0002 m which makes up its scattering unit (scatterer). Then, it is embeded in epoxy resin. Witryna1 paź 2000 · We demonstrate a class of sonic shield materials based on the principle of locally resonant (LR) microstructures. Each local resonator is found to vibrate almost …

Witryna8 wrz 2000 · We have fabricated sonic crystals, based on the idea of localized resonant structures, that exhibit spectral gaps with a lattice constant two orders of magnitude … WitrynaLocally resonant sonic materials. We have fabricated a new type of composite which displays localized sonic resonances at ∼350- 2000 Hz with a microstructure size in the millimeter to centimeter range. Around the resonance frequencies the composite behaves as a material with effective negative elastic constants and as a total wave …

Witrynaunits, called locally resonant sonic materials (LRSMs).13–19) LRSMs contain arrays of elastic resonators composed of a high-density solid core with a coating of a very soft material (silicone rubber)13–17) or with only a very soft continuum unit as the ﬁlling material in a matrix.18,19) The low stiﬀness of the silicone rubber results in ...

WitrynaAs China accelerates the implementation of the marine power strategy, the demand for advanced underwater sound-absorbing materials has become increasingly urgent. Unlike air absorption, the high hydrostatic pressure and complex marine environment impose more stringent requirements regarding underwater sound-absorbing … exchange resend failed messagesWitryna21 lip 2024 · We then extend the framework to locally resonant periodic structures to explore the implications of this phenomenon on bandgap tunability. We show that the tuning capability is available if the cubic nonlinearity is deployed in the internal springs supporting the resonators. ... 2000 Locally resonant sonic materials. Science 289, … exchange resin kayexalateWitryna1 paź 2005 · Using multiple-scattering theory, we studied the transmission properties of a slab of composite material that have sonic band gaps due to local resonances. Thin … exchange residencia for tieWitryna7 wrz 2024 · It can be seen that, when the vibration frequency is away from the locally resonant frequency of the LRUC, the dynamic mass density of the wave-resistance sleeper is close to the static one; however, it will suddenly decrease to a negative value as the vibration frequency is close to the locally resonant frequency of the LRUC. bsod pay here to clickWitryna1 paź 2003 · Abstract. We have fabricated a new type of composite which displays localized sonic resonances at ∼350– 2000 Hz with a microstructure size in the … bsod optionsWitryna1.5 Multi-layer locally resonant structures In layered LRS arrangements the layers are elastically connected in series, which can be represented in one dimension by a … exchange reservationWitrynamaterials. [1 3] The fo cus has b een extended to the study of comp osite m ultipla y er panels with phononic-crystal c haracteristics. [4 19] This is of in terest for ap-plications … exchange resin