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

Jiang, Heng; Wang, Yuren; Zhang, Milin; Yanping, Hu; Ding, Lei; Zhang, Yinmin; Wei, Bingchen

doi:10.1063/1.3216805

Cited by 93 publications

(52 citation statements)

References 27 publications

(24 reference statements)

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“…Thus, phononic glass with greater porosity can more easily achieve broadband absorption because of cooperation from the interpenetrating network. This influence of porosity of phononic glass on its acoustic performance is similar to the influence of thickness previously reported [8,9], where the onset frequencies shifted down as the sample thickness increased. This change with thickness can be explained by local resonance theory.…”

Section: Resultssupporting

confidence: 68%

“…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: 97%

“…According to the formation mechanisms reported in our previous papers, we fabricate phononic glasses with three kinds of materials, each with a different elastic modulus [8][9][10]: stiff polyurethane (PU), compliant PU, and aluminum foams with varying porosity. The storage modulus of stiff PU and compliant PU are 30 and 1.3 MPa, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous works, we fabricated networks of locally resonant phononic crystals (LRPCs) to produce a new sound-absorbing material called a ''phononic glass'' [8][9][10], which exhibited good sound absorption over a wide frequency range as well as good compressive properties [10]. The bandgaps of these materials, calculated using lumped-mass methods, suggest that their wideband absorption originates from multiple locally resonant modes.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2014

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“…This unique property gives rise to a variety of novel phenomena and applications in the area of sound and vibration . These intriguing features include low-frequency band gaps [5,[7][8][9][10][11], low-frequency sound shielding [12][13][14][15], low-frequency sound absorption [16][17][18][19][20][21], negative dynamic density or elastic modulus [2,[22][23][24][25], and even negative refraction [26,27]. On account of their negative dynamic properties and negative refraction behaviours which natural materials do not possess, LRSMs are also designated as acoustic metamaterials [23,26,[28][29][30].…”

Section: Introductionmentioning

confidence: 99%

A Parametric Analysis on the Sound Absorbing Performance of the Locally Resonant Sonic Material Using a Mass-Damper-Spring Model

Yuan¹

2016

AJPA

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Abstract:The locally resonant sonic material (LRSM) is a kind of structural composite. Such composite typically consists of an elastic matrix periodically embedded with metallic spheres, which are coated with soft rubber. Owing to its capability of controlling the low frequency sound, the LRSM has a promising prospect in the application of underwater acoustic materials. This paper proposes a mass-damper-spring model to explain the sound absorbing mechanism of the LRSM, and derives analytical formulae to evaluate the absorbing performance. After reasonable simplification, the analytical formulae can intuitively illustrate the relationship between the absorbing performance and the parameters of the LRSM. The correctness of the physical model was verified by comparing the analytical evaluation with the numerical result calculated by the layer-multiple-scattering method. The result shows that the sound absorption of the LRSM is induced by the energy dissipation of the damped local resonator subjected to excitations. The influence of the parameters on the absorbing performance of the LRSM is analysed systematically. It is shown that a resonator with a heavier core and a stiffer coat can produce a better sound absorbing performance.

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Acoustic Metamaterials for Noise Reduction: A Review

Gao

Zhang

Deng

et al. 2022

Adv Materials Technologies

203

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Noise pollution has become a significant global problem in recent years. Unfortunately, conventional acoustic materials cannot offer substantial improvements in noise reduction. However, acoustic metamaterials are providing new solutions for controlling sound waves, and have huge potential for mitigating noise propagation in particular. Recently, owing to the rapid development of acoustic metamaterials, metamaterials for acoustic noise reduction have drawn the attention of researchers worldwide. These metamaterials are often both light and compact, and are excellent at reducing low‐frequency noise, which is difficult to control with conventional acoustic materials. Recent progress has illustrated that acoustic metamaterials effectively control sound waves, and optimizing their structure can enable functionality based on new physical phenomena. This review introduces the development of acoustic metamaterials, and summarizes the basic classification, underlying physical mechanism, application scenarios, and emerging research trends for both passive and active noise‐reduction metamaterials. Focusing on noise reduction, the shortcomings of current technologies are discussed, and future development trends are predicted. As our knowledge in this area continues to expand, it is expected that acoustic metamaterials will continue to improve and find more practical applications in emerging fields in the future.

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

Cited by 93 publications

References 27 publications

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

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

A Parametric Analysis on the Sound Absorbing Performance of the Locally Resonant Sonic Material Using a Mass-Damper-Spring Model

Acoustic Metamaterials for Noise Reduction: A Review

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