Results 11 to 20 of about 474 (141)
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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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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Analysis of Acoustic Target Strength for the Submarine with Alberich Anechoic Coating Effects
Journal of the Korean Society of Marine Environment and Safety, 2013 * Research Institute of Marine Systems Engineering, Seoul National University Seoul 151-742, Korea** Department of Naval Architecture and Ocean Engineering, Seoul National University Seoul 151-742, Korea *** Department Combatant Ships Project Team, Naval Ship Program, Defense Acquisition Program Administration Seoul 140-833, Korea **** Department of ...
Hyun-Wung Kwon +2 more
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水下无人系统学报The primary structural configuration of underwater equipment consists of cylindrical shells. To study the characteristics of the acoustic target strength(TS) of a cylindrical shell partially covered with anechoic coatings, an anechoic coating with an ...
Qi MA, Shifeng NI, Hao GENG, Haibin YANG
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Sound absorption mechanism of underwater anechoic coating with spherical cavities
Journal of MechanicsAbstract An axisymmetric theoretical model is simplified to investigate sound absorption in the underwater anechoic coating with spherical cavities. An empirical equation is put forward to predict the frequency at the first absorption peak.
Ningdong Hu, Jun Jin, Hongping Hu
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A low-frequency anechoic coating under high hydrostatic pressure by pressure balancing strategy
Journal of Low Frequency Noise, Vibration and Active ControlIt has always been a challenge to develop low-frequency anechoic coatings under high hydrostatic pressure. Based on active pressure balancing strategy (APBS), the airbag embedding in Helmholtz resonator model is proposed to achieve low-frequency and ...
Ningdong Hu, Jun Jin, Hongping Hu
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Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure
Journal of Marine Science and ApplicationAbstract 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 ...
Tiangui Ye, Guoyong Jin, Xinyu Jia
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Journal of Marine Science and Engineering, 2023 To address the problem that anechoic coatings frequently fall off from modern submersible hulls and are detrimental to the realization of underwater acoustic stealth, this paper focuses on the broadband sound absorbing of acoustic coverings in debonding ...
Zhifu Zhang +5 more
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Study on Sound Absorption Characteristics in Seepage State of Anechoic Coating
Highlights in Science, Engineering and Technology, 2022 Aiming at the sound absorption problem of anechoic coating in water seepage state, firstly, the sound absorption coefficient of anechoic coating in infinite water area with steel plate as backing is calculated based on transfer function method and finite element method, anAd the solution results are compared with the analytical result of uniform ...
Xianwen Zhao +3 more
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Investigation of Alberich Coating to Optimise Acoustic Stealth of Submarines
Acoustics, 2022 Due to the nature of their deployment, very few people know the location and course of a submarine during its time at sea, including only a handful of the ship’s crew.
Callum Daniels, Noel Perera
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