Locally resonant phononic woodpile
Witryna12 lut 2024 · The authors consider the guiding of surface acoustic waves by the local resonance band gap of a ZnO pillar-based phononic crystal, by introducing a hollow … WitrynaACOUSTIC MODES OF LOCALLY RESONANT PHONONIC … PHYSICAL REVIEW B 103, 094304 (2024) FIG. 1. A rigid box of mass, m 1, subject to a harmonic force, F(ω), is coupled to an interior point mass, m 2, by a dissipative elastic spring of spring constant k and damping parameter c. this entire resonant unit is replaced by a unit with spatially
Locally resonant phononic woodpile
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Witryna[1]WU F G，LIU Z Y，LIU Y Y.Splitting and tuning characteristics of the point defect modes in two-dimensional phononic crystals[J].Phys.Rev.E.，2004，69（6）：066609. 2.2 能带结构 如图2所示，计算了单胞的色散关系，纵轴为归一化频率，横轴为波矢，从Γ点出发的直线为水银的色散线，与第二能 ... Witryna1 lis 2014 · In principle, such characteristics of woodpile PCs are equivalent to the physical mechanism of locally resonant PCs (i.e., sonic crystals or acoustic meta …
Witryna16 cze 2024 · Numerical results show that different from the single degree-of-freedom mass-spring model, one more locally resonant band gap is generated in the system of two oscillators in series. The introduction of flexible supports, allowing for variable internal coupling between the adjacent cells, produces an extra band gap with a minimum … Witryna9 wrz 2009 · To meet the demand of modern acoustic absorbing material for which acoustic absorbing frequency region can be readily tailored, we introduced woodpile structure into locally resonant phononic crystal (LRPC) and fabricated an underwater acoustic absorbing material, which is called locally resonant phononic woodpile …
WitrynaLocally resonant phononic woodpile: a wide band anomalous underwater acoustic absorbing material. Applied Physics Letters, 95: 104101. doi: 10.1063/1.3216805. Jiang H, Wang Y. 2012. Phononic glass: a robust acoustic-absorption material. WitrynaDOI: 10.1016/J.APACOUST.2011.10.002 Corpus ID: 110724368; Propagation of acoustic waves in the woodpile sonic crystal with a defect …
Witryna8 sie 2012 · In order to achieve strong wide band acoustic absorption under high hydrostatic pressure, an interpenetrating network structure is introduced into the …
new haircuts for women 2021Witryna25 kwi 2014 · We experimentally verify that their frequency band structures depend significantly on the bending resonant behavior of unit cells. We propose a simple theoretical model based on a discrete element method to associate the behavior of locally resonant cylindrical rods with the band gap formation mechanism in … interventions for dyslexia in the classroomWitryna8 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 … new hair cut shortWitrynaLocally resonant phononic woodpile: A wide band anomalous ... - CORE interventions for early decelerationsWitryna22 mar 2024 · Intended for the vibration and noise control problems faced by many engineering fields, a fresh variety of phononic crystal beam structure was constructed by attaching a one-dimensional periodic multilayer cylinder to a double-layer beam structure. Utilizing the finite element method and the Bloch theorem, the vibration modes of the … interventions for drug and alcohol abuseWitrynaThe locally resonant sonic material (LRSM) is an artificial metamaterial that can block underwater sound. The low-frequency insulation performance of LRSM can be … new haircuts for womenWitryna为了提高水下航行器的生存能力，通常会在其表面敷设水声吸声材料以吸收声纳发出的探测声波。. 本文综述了水声吸声材料及吸声结构的研究进展，介绍了基体材料改性、 … interventions for dyslexia phonics