吸声覆盖层研究进展

A review of anechoic coating research

从粘弹性材料复杂结构吸声性能计算和粘弹性材料动态力学参数获取两方面对吸声覆盖层研究进行了回顾。计算模型主要有分层介质模型、等效介质模型、空腔谐振模型以及数值计算方法。动态力学参数获取主要有基于振动的直接测量方法、基于声学性能测试的反演方法和近些年发展起来的有限元的反演方法。最后对吸声覆盖层研究的发展趋势进行了展望。

A literature review on anechoic coating is presented from two aspects： mathematical models describing the waves in complicate coating structures and methods obtaining elastic modulus of the materials. Mathematical models include transfer matrix method, effective medium model, cavity resonances model and finite element method. While the elastic modulus of the materials may be obtained by direct measurement, acoustic inversion and vibration inversion using finite element method appeared in recent years. Finally, a prospect of remained problems is presented at the end of the paper.