聚合物的水声吸收数学模型与实验研究

Modeling and experiment study on the underwater acoustic absorption of polymer materials

以声波在高分子介质中的传播理论为依据,应用阻抗匹配法,推导出了材料的水下吸声的数学模型,为对该模型进行实验验证,设计合成了一系列声速和声衰减系数不同的聚合物,测试了它们的水下吸声系数、声速和声衰减系数,并用理论计算结果与测试结果对比,发现理论计算得到的水声材料的吸声系数与实测值非常接近,表明该数学模型可以较准确地预测材料的水声吸声性能,指导水声吸声材料的设计。

An analysis of the behavior of sound propagation in the polymer materials was performed. The relationship among the underwater acoustic absorption properties （α） and sound speed （Cr）,sound attenuation coefficient （β） of polymer materials was established. The acoustic absorption properties （α） of a series of polymer materials were measured. It is found that the tested data are fairly good agreement with the calculated data by Substituting C, and β to the mathematic model. This mathematical model can be used to estimate the acoustic absorption properties of polymer materials.