水下弹性粒子悬浮层的声学特性  

Acoustic Character of Underwater Suspension Layer with Elastic Particles

作　　者：宋扬[1] 朴胜春[1] 郭有松 

机构地区：[1]哈尔滨工程大学水声工程学院,哈尔滨150001 [2]船舶系统工程部,北京100036

出　　处：《噪声与振动控制》2009年第1期1-4,共4页Noise and Vibration Control

基　　金：国防水声技术国家重点实验室基金项目(9140C200701080C20)

摘　　要：声波照射到悬浮层上,除界面处产生反射和透射外,在层中传播还会产生衰减。对弹性粒子悬浮层的声学特性进行理论计算与仿真,给出弹性粒子悬浮层对声波的衰减系数、反射系数、透射系数等声学特性,随频率、悬浮层及其弹性粒子特征参数的变化规律。研究表明,低频情况下悬浮层声学特性随特征参数变化不明显,随着频率的升高,其声学特性对特征参数变得更加敏感。When sound wave irradiates suspension layer, there is propagation attenuation in the layer besides reflection and transmission in the interface. Theory and computer simulation about acoustic character of underwater suspension with elastic particles are given. The rule of acoustic character of suspension layer changed with frequency and characteristic parameters of layer and particles is drawn. The results show that the variation of acoustic character of suspension layer in low frequency is not sharp. With the increase of frequency, the acoustic character of suspension layer is more sensitive to the characteristic parameters.

关 键 词：声学 悬浮层 弹性粒子 声学特性 特征参数 

分 类 号：TB564[交通运输工程—水声工程]