轻质夹层复合吸声结构的水声性能实验研究

李 浩;梅志远;朱 锡

振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 51-54.

振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 51-54.
论文

轻质夹层复合吸声结构的水声性能实验研究

  • 李 浩;梅志远;朱 锡
作者信息 +

Experimental Study on Underwater Acoustical Properties of Sound Absorption Structure of Light Sandwich Composite

  • LI Hao; MEI Zhi-yuan;ZHU Xi
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文章历史 +

摘要


摘 要:夹层复合吸声结构具有很强的可设计性,得到广泛的应用,但以往研究的此夹层结构的吸声芯材存在密度较大的问题。为解决此问题,本文采用玻璃钢作为表层材料和多种空心玻璃微珠混合填充环氧树脂和聚氨酯改性环氧树脂合成的高分子吸声材料作为芯材设计了一种轻质夹层复合吸声结构。首先研究确定了表层材料的厚度,并制作了脉冲声管测试试件,根据测试结果确定芯材的合成配方,根据此配方制作了消声水池测试试件,在消声水池中测试了其吸声系数和反射系数,最后对该结构的吸声机理进行了分析,结果证明:用空心玻璃微珠填充环氧树脂和聚氨酯改性环氧树脂可以合成低密度高分子吸声材料(相对密度0.8±0.05),用其作为芯材制作的夹层复合吸声结构具有良好的吸声性能,降低夹层结构的整体重量的同时也具有很好的声隐身效果,更有利于工程的应用。

Abstract

Abstract: Sound absorption structure of sandwich composite had been extensively applied because it was designable. In this paper, in order to solving this problem that the density of sound absorption core material of previous sandwich composite structure was larger, a kind of sound absorption structure of light sandwich composite was designed. The surface material of this structure is GFRP, and the core material is polymer sound absorption material synthesized from a variety of hollow glass microsphere, epoxy resin and polyurethane- modified epoxy resin. The thickness of surface GERP material was study and determined. The underwater acoustical properties of specimen were measured in the sound pulse tube. The synthetic formula of core material was determined based the test results of pulse tube specimen. The sample was prepared for anechoic tank test. The sound reflection coefficient and sound absorption coefficient of this sample was measured in the anechoic tank. Then, the sound absorption mechanism of sound absorption structure of sandwich composite was analyzed. The research results showed that polymer sound absorption material synthesized from a variety of hollow glass microsphere, epoxy resin and polyurethane-modified epoxy resin has a low density(relative density 0.8±0.05). Sound absorption structure of sandwich composite has an excellent underwater sound absorption property using this core material. This light sandwich structure must be more conducive to engineering applications because of its low density and excellent sound stealth properties.

关键词

复合材料 / 夹层 / 空心玻璃微珠 / 声学性能

Key words

composite / sandwich / hollow glass microsphere / acoustic performance

引用本文

导出引用
李 浩;梅志远;朱 锡. 轻质夹层复合吸声结构的水声性能实验研究[J]. 振动与冲击, 2011, 30(4): 51-54
LI Hao;MEI Zhi-yuan;ZHU Xi. Experimental Study on Underwater Acoustical Properties of Sound Absorption Structure of Light Sandwich Composite[J]. Journal of Vibration and Shock, 2011, 30(4): 51-54

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