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Tunable underwater sound absorption characteristics of 0–3 piezoelectric anechoic coating
The Journal of the Acoustical Society of AmericaPiezoelectric composite materials (PCMs) with shunt damping circuits are used widely in hydroacoustics because of the flexible adjustability of their parameters. PCMs offer good underwater sound absorption, but shortcomings remain, such as poor low-frequency sound absorption, narrow bandwidth, and a single dissipation mechanism.
Xinyu Jia +4 more
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Journal of Sound and Vibration, 2018
Abstract Rubbery coatings embedded with air cavities are commonly used on underwater structures to reduce reflection of incoming sound waves. In this paper, the relationships between Poisson's and modulus loss factors of rubbery materials are theoretically derived, the different effects of the tiny Poisson's loss factor on characterizing the loss ...
Jie Zhong +4 more
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Abstract Rubbery coatings embedded with air cavities are commonly used on underwater structures to reduce reflection of incoming sound waves. In this paper, the relationships between Poisson's and modulus loss factors of rubbery materials are theoretically derived, the different effects of the tiny Poisson's loss factor on characterizing the loss ...
Jie Zhong +4 more
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Applied Acoustics, 2019
Abstract The finite element method (FEM) is commonly used to analyze the underwater acoustic performances of rubbery coatings due to its flexibility to model scatterers of complex geometric dimensions. However, its calculation efficiency is always denounced as a drawback for its application on optimization design where a large number of repeated ...
Jie Zhong +4 more
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Abstract The finite element method (FEM) is commonly used to analyze the underwater acoustic performances of rubbery coatings due to its flexibility to model scatterers of complex geometric dimensions. However, its calculation efficiency is always denounced as a drawback for its application on optimization design where a large number of repeated ...
Jie Zhong +4 more
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Optimization Design of Acoustic Performance of Underwater Anechoic Coatings
Acoustics Australia, 2022Shuailong Zhou, Zhi Fang
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Anechoic coatings obtained from two- and three-dimensional monopole resonance diffraction gratings
The Journal of the Acoustical Society of America, 2012Underwater sound reflections can be reduced in magnitude by a rubber coating including three-dimensional (3-D) cavities forming a doubly periodic diffraction grating. A monopole resonance for sphere-like cavities enhances absorption in the surrounding rubber solid.
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Note on the validity of using plane-wave type relations to characterize Alberich anechoic coatings
The Journal of the Acoustical Society of America, 1992The efficiency of echo reduction due to the coating of a rigid plane structure by a properly designed material can be determined via the measurement of the reflection and transmission coefficients of a panel made up with this material using a simple, plane-wave type relation.
Anne-Christine Hladky-Hennion +1 more
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The Journal of the Acoustical Society of America, 2014
Global optimization methods can be used to numerically determine optimal design parameters for an object. However, this does not by itself give a good appreciation of other parameter choices that may be almost as good and even preferable from other points of view.
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Global optimization methods can be used to numerically determine optimal design parameters for an object. However, this does not by itself give a good appreciation of other parameter choices that may be almost as good and even preferable from other points of view.
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Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment
As the technological development of modern weapons systems progresses, attack and defense against the weapons systems of the past can become useless. In the case of underwater weapon systems, improvements in sonar and torpedo technology necessitate enhancements in submarine stealth performance. The stealth performance of a submarine is analyzed through
Jae-Yong Kim +3 more
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As the technological development of modern weapons systems progresses, attack and defense against the weapons systems of the past can become useless. In the case of underwater weapon systems, improvements in sonar and torpedo technology necessitate enhancements in submarine stealth performance. The stealth performance of a submarine is analyzed through
Jae-Yong Kim +3 more
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Physica Scripta
Abstract Given the inherently three-dimensional (3D) nature of practical underwater applications, this study investigates the influence of geometric factors on the acoustic absorption performance of three-dimensional dual-graded anechoic coatings (3D DGAC).
Xiuhai Zhang +4 more
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Abstract Given the inherently three-dimensional (3D) nature of practical underwater applications, this study investigates the influence of geometric factors on the acoustic absorption performance of three-dimensional dual-graded anechoic coatings (3D DGAC).
Xiuhai Zhang +4 more
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