摘要
针对水下含气泡橡胶材料的隔声性能进行了研究。利用以往文献中Kelvin-Voigt粘弹性模型,得到材料动态等效体积模量、等效剪切模量及等效纵波声速随频率变化的关系,通过传递矩阵法数值计算、分析了不同孔隙率、孔径的情况下,材料的隔声性能、等效声速的变化。仿真结果表明,气泡的孔径、孔隙率的变化对复合材料的隔声性能都有显著的影响。该结果对水下隔声材料的设计有一定的参考意义。
A study of sound insulation capability of underwater elastomers containing cavities has been made. By using the Kelvin-Voigt viscoelastic model, the dynamic equivalent bulk modulus, the effective shear modulus and the equivalent dilatational wave speed of the material are deduced. The insulation ability of the equivalent material and the equivalent sound speed has also been calculated by transfer matrix theory under different porosity and cavity radius. The results of simulation show that cavity radius and porosity affect the sound insulation capability of composites, and the conclusion is useful for the design of sound insulation materials.
出处
《声学技术》
CSCD
北大核心
2008年第5期680-683,共4页
Technical Acoustics
关键词
水声
隔声
含气泡橡胶
动态有效模量
underwater acoustics
sound insulation
elastomer containing cavities
dynamic equivalent properties
作者简介
唐广鑫（1983-），男，广西桂林人，硕士研究生，研究方向为噪声与振动控制。
通讯作者：刘克，E-mail：kevine@mail．ioa．ac．cn
