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Improvement in underwater acoustic absorption performance of open-celled SiC foam
Xu, Weigang; Jiang, Chunhai; Zhang, Jinsong; jshzhang@imr.ac.cn
2015
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume482Pages:568-574
AbstractOpen-celled silicon carbide (SiC) foam has been proven of a promising underwater acoustic absorption material. However, further improvement of its sound absorption capacity especially at low frequency is restricted by the acoustic impedance mismatch between the foam material and the water surrounding it. Howto tailor the existing SiC foam in order to achieve an optimized impedance match is a key issue. In this work, the underwater acoustic absorption performance of open-celled SiC foam is studied by both analytical and experimental methods. First, based on Zwikker-Kosten's theory, the modified Johnson-Allard (J-A) model is proposed to analytically predict the absorption performance of liquid-saturated SiC foam. Then three approaches including (i) backing the test samples by a 30-mm-thick air cavity, (ii) enclosing a certain amount of water and (iii) filling the samples with silicon oil are proposed to improve the underwater sound absorption performance of SiC foam. The underwater acoustic absorbency of the silicon oil filled SiC foam is significantly improved, especially in the low frequency band. A sound absorption coefficient near unity is achieved by this manner over a significant portion of the investigated frequency range, eg. 750-4000 Hz. The foam partially filled with water also shows enhanced sound absorbency at low frequency, but the foams backed by air gap and saturated fully by water display degraded sound absorption capacity. (C) 2015 Elsevier B.V. All rights reserved.
description.department[xu, weigang ; jiang, chunhai ; zhang, jinsong] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordSic Foam Underwater Acoustic Absorption Impedance Matching Johnson-allard Model
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74902
Collection中国科学院金属研究所
Corresponding Authorjshzhang@imr.ac.cn
Recommended Citation
GB/T 7714
Xu, Weigang,Jiang, Chunhai,Zhang, Jinsong,et al. Improvement in underwater acoustic absorption performance of open-celled SiC foam[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2015,482:568-574.
APA Xu, Weigang,Jiang, Chunhai,Zhang, Jinsong,&jshzhang@imr.ac.cn.(2015).Improvement in underwater acoustic absorption performance of open-celled SiC foam.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,482,568-574.
MLA Xu, Weigang,et al."Improvement in underwater acoustic absorption performance of open-celled SiC foam".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 482(2015):568-574.
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