Sound absorption behaviors of composite functionally graded acoustic structure under hydrostatic pressure

Shi, Kangkang; Hu, Dongsen; Li, Dongsheng; Jin, Guoyong

doi:10.1016/j.apacoust.2023.109474

Cited by 11 publications

(4 citation statements)

References 43 publications

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“…1.5 MPa静水压力下, 该超材料在5625~7000 Hz频段内的平均吸声达到了0.9. 贾薪宇等人通过在锥形多孔泡沫铝周图 3 (网络版彩色)3种功能梯度型声学结构 [39] . (a) 两层FGMs复合; (b) 单层FGM与梯度空腔复合; (c) 两层FGMs与梯度空腔复合 Figure 3 (Color online) Three functional gradient acoustic structures [39] .…”

Section: 吸声结构抗压设计unclassified

“…贾薪宇等人通过在锥形多孔泡沫铝周图 3 (网络版彩色)3种功能梯度型声学结构 [39] . (a) 两层FGMs复合; (b) 单层FGM与梯度空腔复合; (c) 两层FGMs与梯度空腔复合 Figure 3 (Color online) Three functional gradient acoustic structures [39] . (a) Two-layer FGMs composite; (b) single-layer FGM is compounded with gradient cavities; (c) two-layer FGMs are compounded with gradient cavities 图 4 (网络版彩色)具有增强结构的抗压水声吸声结构.…”

Section: 吸声结构抗压设计mentioning

confidence: 99%

Section: 吸声结构抗压设计unclassified

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A review of hydroacoustic absorbing materials under hydrostatic pressure

Wei,

Zhao,

Wang

et al. 2024

Chin. Sci. Bull.

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Section: 吸声结构抗压设计unclassified

Section: 吸声结构抗压设计mentioning

confidence: 99%

Section: 吸声结构抗压设计unclassified

See 1 more Smart Citation

A review of hydroacoustic absorbing materials under hydrostatic pressure

Wei,

Zhao,

Wang

et al. 2024

Chin. Sci. Bull.

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“…The material properties of each component of the MMSC−AS are listed in Table 1, which were the same as those in ref. [49]. The sound speed and density of water were c = 1489 m/s and ρ 0 = 1000 kg/m 3 .…”

Section: Acoustic Model Validationmentioning

confidence: 99%

A New Multi-Mechanism Synergistic Acoustic Structure for Underwater Low-Frequency and Broadband Sound Absorption

Shi,

Li,

et al. 2023

JMSE

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The acoustic absorption characteristics of anechoic coatings attached to the surface of underwater vehicles are closely related to their acoustic stealth. Owing to the essential property of local resonance, the narrow sound-absorption band cannot meet the underwater broadband sound absorption requirements. To this end, a multi-mechanism synergistic composite acoustic structure (MMSC−AS) was designed according to the integration of multiple acoustic dissipation mechanisms in this paper. Then, the acoustical calculation model for MMSC−AS was developed by using the graded finite element method (G-FEM), and the feasibility and the correctness of the established acoustical calculation model were verified. The underwater sound absorption behaviors of MMSC−AS were studied, and the optimization of the sound absorption characteristics of the MMSC−AS was also carried out. The results indicated that the calculation accuracy of the G-FEM was better than that of the FEM under the condition of the same mesh elements. Moreover, there were many sound wave regulation mechanisms in the MMSC−AS, and the synergy between the mechanisms enriched the mode of sound acoustic energy dissipation, which could widen the absorption band with effect. This study provides theoretical and technical basis for breaking through the challenge of low-frequency and broadband acoustic structure design of underwater vehicles.

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Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure

Jia,

Jin,

2024

J. Marine. Sci. Appl.

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The underwater anechoic coating technology, which considers pressure resistance and low-frequency broadband sound absorption, has become a research hotspot in underwater acoustics and has received wide attention to address the increasingly advanced low-frequency sonar detection technology and adapt to the working environment of underwater vehicles in deep submergence. One the one hand, controlling low-frequency sound waves in water is more challenging than in air. On the other hand, in addition to initiating structural deformation, hydrostatic pressure also changes material parameters, both of which have a major effect on the sound absorption performance of the anechoic coating. Therefore, resolving the pressure resistance and acoustic performance of underwater acoustic coatings is difficult. Particularly, a bottleneck problem that must be addressed in this field is the acoustic structure design with low-frequency broadband sound absorption under high hydrostatic pressure. Based on the influence of hydrostatic pressure on underwater anechoic coatings, the research status of underwater acoustic structures under hydrostatic pressure from the aspects of sound absorption mechanisms, analysis methods, and structural designs is reviewed in this paper. Finally, the challenges and research trends encountered by underwater anechoic coating technology under hydrostatic pressure are summarized, providing a reference for the design and research of low-frequency broadband anechoic coating.

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Sound absorption behaviors of composite functionally graded acoustic structure under hydrostatic pressure

Cited by 11 publications

References 43 publications

A review of hydroacoustic absorbing materials under hydrostatic pressure

A review of hydroacoustic absorbing materials under hydrostatic pressure

A New Multi-Mechanism Synergistic Acoustic Structure for Underwater Low-Frequency and Broadband Sound Absorption

Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure

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