聚合物的水声吸声与动态力学性能关系的研究

以声波在高分子介质中的传播理论为依据，推导出了材料的水下吸声性能与其声学参数如声速和声衰减系数之间的关系式，在此基础上，以描述高分子材料粘弹行为的三元模型为出发点，推导出了材料的水声吸声性能与材料的动态力学性能参数包括损耗因子、松弛前的剪切模量、松弛后的剪切模量以及材料的密度和厚度之间的关系式为对所推导的关系式进行验证，设计合成了一系列阻尼性能不同的聚合物，分别测试了它们的动态力学性能和声学性能。结果表明：用材料的动态力学性能参数计算得到的水声吸声系数与实验测得的吸声系数的变化趋势一致，可利用对动态力学性能的研究结果指导水声吸声材料的设计．

Study on the Relationship Between Underwater Acoustic Absorption and Dynamic Mechanical Property of Polymer Materials

An analysis of the behavior of sound propagation in the polymer material was performed.The relationship between the underwater acoustic absorption property and acoustic parameters such as sound speed,sound attenuation coefficient was established.To determine attenuation coefficient and sound speed,the single relaxation time model was used.The mathematical relationships relating sound speed and sound attenuation coefficient respectively as a function of loss factor,modulus,density and frequency were established.In order to check the mathematical model,a series of polymers were designed and synthesized.Their acoustic absorption coefficients were measured.It is found that the tested data are in good agreement with the calculated data.This mathematical model can be used to estimate the acoustic absorption property of polymer materials.