The Research of Acoustic Characteristic from a Submerged Viscoelastic Functionally Graded Materials

Abstract:

In this paper, we designed a FGM which can be used as the cover of underwater target and research its mid-low frequency acoustic characteristic just as reflection and absorption coefficient. Based on transfer matrix method, we research the FGM acoustic reflection and absorption coefficient change with the variation of constituent material property, number of hierarchy, and volume fraction. We found that its reflection and absorption coefficient are determinated by material property and volume fraction, and could be equivalent to multi-layer composite structure with specific number of layers to address acoustic problems. If elastic layer added, both acoustic characteristic and mechanics characteristic could be improved, which contributes to the research and design of structure/acoustic stealth FGM.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 132-136
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.132
• Online since: December 2012
• Authors: Yan Bing Zhang, Chun Yu Ren, Xi Zhu
• Keywords: Absorption Coefficient, Composite Structure, Functionally Graded Material (FGM), Reflection Coefficient, Transfer Matrix Method (TMM)

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