The Research of Acoustic Characteristic from a Submerged Viscoelastic Functionally Graded Materials
The Research of Acoustic Characteristic from a Submerged Viscoelastic Functionally Graded Materials
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DOI：
10.4028/www.scientific.net/amr.602-604.132
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发表时间：
2012-12
期刊：
影响因子：
--
通讯作者：
Y. Zhang;C. Ren;Xi Zhu
中科院分区：
文献类型：
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作者：
Y. Zhang;C. Ren;Xi Zhu
本文设计了一种可作为水下目标覆盖层的功能梯度材料，研究了其中低频声学特性，如反射系数和吸收系数。基于传递矩阵法，研究了功能梯度材料声反射系数和声吸收系数随组成材料性质、层数和体积分数的变化规律。研究发现，其反射和吸收系数由材料性质和体积分数决定，可以等效为特定层数的多层复合结构来解决声学问题。通过添加弹性层，可以改善材料的声学性能和力学性能，为结构/声学隐身功能梯度材料的研究和设计提供了理论依据。
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.