Absorptive properties of three-dimensional phononic crystal

Zhao, Honggang; Liu, Yaozong; Yu, Dianlong; Wang, Gang; Wen, Jihong; Wen, Xisen

doi:10.1016/j.jsv.2007.01.004

Cited by 58 publications

(30 citation statements)

References 21 publications

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“…[1][2][3][4] Recent theoretical calculation has indicated that the maximum viscoelastic energy dissipation is generated at locally resonant frequency when considering viscoelastic deformation in LRPC. [5][6][7] It means that the LRPC can also be employed to expand the content of acoustic absorbing materials study. However, rare experimental studies are performed in this direction.…”

mentioning

confidence: 99%

Locally resonant phononic woodpile: A wide band anomalous underwater acoustic absorbing material

Jiang¹,

Wang²,

Zhang³

et al. 2009

Applied Physics Letters

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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 ͑LRPC͒ and fabricated an underwater acoustic absorbing material, which is called locally resonant phononic woodpile ͑LRPW͒. Experimental results show that LRPW has a strong capability of absorbing sound in a wide frequency range. Further theoretical research revealed that LRPC units and woodpile structure in LRPW play an important role in realization of wide band underwater strong acoustic absorption.

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mentioning

confidence: 99%

Locally resonant phononic woodpile: A wide band anomalous underwater acoustic absorbing material

Jiang¹,

Wang²,

Zhang³

et al. 2009

Applied Physics Letters

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“…Several researchers previously studied the band structure of VPCs, 2 but investigations on wave attenuation of VPCs are relatively limited. The effect of the mode conversion 3 and the local resonance 4 to the attenuation of VPCs has been investigated, but the frequency ranges considered in these works were relatively higher or narrower than the range focused on this work. Targeting at a broad low-frequency range, attenuation in VPCs made of a viscoelastic matrix and hollow glass spheres has been studied.…”

Section: Wave Attenuation and Dissipation Mechanisms In Viscoelastic mentioning

confidence: 99%

“…When the host viscoelastic material is modeled by a linear viscoelastic theory, 1 its damping effect can be expressed in terms of a complex-valued stiffness matrix C Ã , which can be written as 3 for tungsten. Air inclusions are modeled with c l ¼ 330 m=s, c t ¼ 0 m=s, and q ¼ 1 kg=m 3 .…”

Section: Wave Attenuation and Dissipation Mechanisms In Viscoelastic mentioning

confidence: 99%

Wave attenuation and dissipation mechanisms in viscoelastic phononic crystals

Kim

2013

Journal of Applied Physics

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“…In LRSMs, locally resonant absorption coincides with viscoelastic deformation [11][12][13][14][15][16][17][18]. The sound-absorption region in LRPCs was first found using the multiple-scattering approach; these results showed that a conversion from longitudinal mode to transverse mode near the locally resonant frequencies effectively enhanced the anechoic performance of these materials [7,14].…”

Section: Introductionmentioning

confidence: 99%

“…The sound-absorption region in LRPCs was first found using the multiple-scattering approach; these results showed that a conversion from longitudinal mode to transverse mode near the locally resonant frequencies effectively enhanced the anechoic performance of these materials [7,14]. Subsequent reports used finite element methods (FEM) to study the dynamic modes and corresponding sound absorption of localized resonance [17,18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of locally resonant absorption and factors affecting the absorption band of a phononic glass

et al. 2014

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We experimentally and theoretically investigated the mechanisms of acoustic absorption in phononic glass to optimize its properties. First, we experimentally studied its locally resonant absorption mechanism. From these results, we attributed its strong sound attenuation to its locally resonant units and its broadband absorption to its networked structure. These experiments also indicated that the porosity and thickness of the phononic glass must be tuned to achieve the best sound absorption at given frequencies. Then, using lumped-mass methods, we studied how the absorption bandgaps of the phononic glass were affected by various factors, including the porosity and the properties of the coating materials. These calculations gave optimal ranges for selecting the porosity, modulus of the coating material, and ratio of the compliant coating to the stiff matrix to achieve absorption bandgaps in the range of 6-30 kHz. This paper provides guidelines for designing phononic glasses with proper structures and component materials to work in specific frequency ranges.

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Absorptive properties of three-dimensional phononic crystal

Cited by 58 publications

References 21 publications

Locally resonant phononic woodpile: A wide band anomalous underwater acoustic absorbing material

Locally resonant phononic woodpile: A wide band anomalous underwater acoustic absorbing material

Wave attenuation and dissipation mechanisms in viscoelastic phononic crystals

Investigation of locally resonant absorption and factors affecting the absorption band of a phononic glass

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