Acoustic Characters Study on the Influence of Micro-Fillings in Underwater Sandwich Composite Structure

Zhong Luo; Jun Bo Hu

doi:10.4028/www.scientific.net/AMM.275-277.1678

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 275-277Acoustic Characters Study on the Influence of...

Acoustic Characters Study on the Influence of Micro-Fillings in Underwater Sandwich Composite Structure

Abstract:

Sandwich composite is a new structure of acoustic stealth structure, implementing both loading and acoustic stealth. Micro-fillings can improve the sandwich absorption coefficient. The influence parameters are studied by absorption theories analysis of sandwich structure. The absorption and reflection coefficient in different categories, size and layers of fillings are analyzed by pulse tube experiments. The results shows that the first absorption peak moves to low frequency by adding fillings, the peak frequency are lower when the fillings size increase, and the absorption coefficient are higher when the thickness of sandwich layers are closed.

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Periodical:

Applied Mechanics and Materials (Volumes 275-277)

Pages:

1678-1682

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.275-277.1678

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Online since:

January 2013

Authors:

Zhong Luo, Jun Bo Hu

Keywords:

Absorption Coefficient, Absorption Theories, Micro-Fillings, Sandwich Composite Structure

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