Results 1 to 10 of about 456 (152)
Research on sound absorption characteristics of Alberich anechoic coatings in debonding states [PDF]
MATEC Web of Conferences, 2019 Viscoelastic structures with periodic cavity arrangement occupy an important position in acoustic stealth. Most studies focus on the absorption at low frequency, under large pressure and in a wide frequency band, however, the sound absorption properties ...
Zhao Xianwen +3 more
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Inverse design of periodic cavities in anechoic coatings with gradient changes of radii and distances via a conditional generative adversarial network [PDF]
Scientific ReportsAnechoic coatings are usually applied to underwater targets, such as submarine shells, to reduce the detection distance of enemy active sonar. The main challenge is obtaining low-frequency and broadband sound absorption characteristics through the design
Yiping Sun +4 more
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Absorption characteristics of multi-layered material anechoic coating on frustum-of-a-cone cavities [PDF]
MATEC Web of Conferences, 2016 Improve the low-frequency acoustic performance of sound absorption coating of submarine is a hot issue. Based on the theory of sound wave normally impinging on the absorption layer of 2D,the 2D shaft mode of frustum-of-a-cone cavities is established by ...
Liu Guo-qiang, Lou Jing-jun, Li Hai-tao
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Zhongguo Jianchuan Yanjiu, 2022 ObjectivesAn underwater anechoic coating layer laid on the hull surface of a submarine is squeezed under the action of high hydrostatic pressure, changing its shape and material parameters, which has a great impact on sound absorption performance ...
Wenkai DONG, Meixia CHEN
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IEEE Access, 2022 Recent studies show that the shape of the internal cavity with periodic distribution has a significant impact on the characteristics of the anechoic coating. In this study, we proposed a genetic algorithm-based method for optimizing the design parameters
Lei Fu, Ming Yang, Yiping Sun, Meng Tao
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Development of a Simple Setup to Measure Shielding Effectiveness at Microwave Frequencies [PDF]
SensorsTesting the shielding effectiveness of materials is a key step for many applications, from the industrial to the biomedical field. This task is very relevant for high-sensitivity sensors, whose performance can be greatly affected by electromagnetic ...
Emanuele Cardillo +6 more
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Direction-Finding Study of a 1.7 mm Diameter Towed Hydrophone Array Based on UWFBG [PDF]
SensorsThis paper investigates a 1.7 mm diameter ultra-weak fiber Bragg grating (UWFBG) hydrophone towed array cable for acoustic direction finding. The mechanism of the underwater acoustic waves received by this integrated-coating sensitizing optical cable is ...
Su Wu +4 more
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Residue-free acoustofluidic manipulation of microparticles via removal of microchannel anechoic corner [PDF]
Ultrasonics Sonochemistry, 2022 Surface acoustic wave (SAW)-based acoustofluidics has shown significant promise to manipulate micro/nanoscale objects for biomedical applications, e.g. cell separation, enrichment, and sorting.
Muhammad Soban Khan +3 more
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Results in Physics, 2021 Considering the influence of hydrostatic pressure on geometric parameters of a lining, this paper first proposes a complete global four-terminal acoustic theoretical prediction method based on phenomenological theory for a semi-active composite coating ...
Zhifu Zhang +3 more
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Numerical Simulation of Anechoic Coating by Combining FEM and ADM
نشریه مهندسی دریا, 2018 The absorption performance of anechoic coatings depends on the material properties, layer thicknesses and cavity distribution density and cavity size. In this paper a design method based on numerical simulation was presented by combining FEM and acoustic
Seyed Hamid Sohrabi +1 more
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