Locally resonant phononic woodpile
WitrynaLocally resonant phononic woodpile: A wide band anomalous underwater acoustic absorbing material Heng Jiang,1,2 Yuren Wang,2,a Milin Zhang,1 Yanping Hu,2 Ding … 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 …
Locally resonant phononic woodpile
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Witryna在无源无损的要求下，声学超表面大多是基于广义Snell定律(GSL)设计的，在该定律下，整个表面满足局域能流守恒条件。然而，最近对异常反射超光栅的研究表明，这类结构在其效率上有一个内在的固有问题。为了解决这一问题，必须放宽局域能流守恒条件的限制，引入非局域能流守恒条件。 为了 ... WitrynaThe locally resonant sonic material (LRSM) is an artificial metamaterial that can block underwater sound. The low-frequency insulation performance of LRSM can be …
WitrynaMulti-layered locally resonant phononic crystals (LRPCs) with wider and multiple bandgaps (BGs) in low frequency range and small size of the unit cell have promising … http://sourcedb.imech.cas.cn/zw/rck0/zgjzj/zkywzl/201211/t20121129_3694934.html
Witryna单晶硅熔凝过程中固液界面形貌及微缺陷形成研究 ：单晶硅是半导体产业中的支柱性材料。. 我们采取X射线形貌学方法，对单晶硅熔凝过程中固液界面形貌变化及界面附近位 … 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
Witryna2 wrz 2011 · Recently, by introducing locally resonant scatterers with spherical shape proposed in phononic crystals into design of underwater sound absorption materials, …
Witryna22 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 … post pregnancy food delivery serviceWitryna9 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 … post pregnancy girdle mother maternityWitryna14 lis 2024 · [15] Jiang H et al. 2009 Locally resonant phononic woodpile: a wide band anomalous underwater acoustic absorbing material Appl. Phys. Lett. 95 104101. Go to reference in article; Crossref; Google Scholar [16] Zhao H, Wen J, Yu D and Wen X 2010 Low-frequency acoustic absorption of localized resonances: experiment and theory J. … total right knee arthroplasty cpt codeWitrynaWe 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 … post pregnancy hair loss stylesWitrynaSonic metamaterials have important applications in many fields such as noise control, and acoustic communication. Bwand gap and sound-absorbing spectrum are main judgements for the properties of sonic metamaterials. To broaden the resonant band gap and sound-absorbing spectrum, Woodpile structure was introduced into sonic … total right knee replacement icd 10WitrynaWe study “nanoptera,” which are nonlocalized solitary waves with exponentially small but nondecaying oscillations, in two singularly perturbed Hertzian chains with … post pregnancy food indianWitrynaHowever, because the band gap of a single local resonance-type metamaterial is too narrow, to achieve broadband sound absorption, Jiang et al. proposed a phononic … post pregnancy hair fall remedy