GMA phased array for active echo control of underwater target

Tang, Jun; Bai, Yutian; Yan, Lei; Wang, Wenjie

doi:10.1016/j.apacoust.2022.108646

Cited by 5 publications

(4 citation statements)

References 21 publications

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“…Therefore, studies using sounds at various incident angles are required. Accordingly, the echoes for various incident angles have also been adjusted [ 121 ]. Low-profile transducers will be widely used in underwater vehicle detection and concealment technology, and they will continue to be developed to improve their performance.…”

Section: Discussionmentioning

confidence: 99%

Design of Piezoelectric Acoustic Transducers for Underwater Applications

Pyun

Kim

Park

2023

Sensors

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Interest in underwater transducers has persisted since the mid-1900s. Underwater transducers are designed in various shapes using various materials depending on the purpose of use, such as to achieve high power, improve broadband, and enhance beam steering. Therefore, in this study, an analysis is conducted according to the structural shape of the transducer, exterior material, and active material. By classifying transducers by structure, the transducer design trends and possible design issues can be identified. Researchers have constantly attempted new methods to improve the performance of transducers. In addition, a methodology to overcome this problem is presented. Finally, this review covers old and new research, and will serve as a reference for designers of underwater transducer.

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Section: Discussionmentioning

confidence: 99%

Design of Piezoelectric Acoustic Transducers for Underwater Applications

Pyun

Kim

Park

2023

Sensors

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“…Considering changes in structural deformation and material parameters when examining the sound absorption effect of acoustic structures under hydrostatic pressure is necessary. Research in this area is currently limited, and studies on the acoustic performance of anechoic coatings under hydrostatic pressure typically involve experiments (Humphrey et al, 2008;Audoly, 2011;Gu et al, 2021b;Gao et al, 2022;Tang et al, 2022;Gao et al, 2023;Ren et al, 2023). Therefore, theoretical and computational approaches to the acoustic performance of anechoic coatings under hydrostatic pressure are still required.…”

Section: Analysis Methods Of Acoustic Performance Under Hydrostatic P...mentioning

confidence: 99%

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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“…与常压相比, 静水压下水声吸声材料声学特性的分析更为困难. 利用水声声管 [26,28] 或压力水罐 [29,30] 可直接进行静水压下水声材料的吸声测试, 但实验成本高昂, 难以应用于整个研究阶段. 建立准确、高效的建模分析方法, 对预测水声材料声学性能至关重要.…”

Section: 静水压下水声材料吸声分析方法unclassified