%0 Journal Article
%T Analysis of the anechoic properties of viscoelastic coatings with periodically distributed cavities<br>含有周期球腔的黏弹性覆盖层消声性能分析
%A Zhao Hong-Gang
%A Liu Yao-Zong
%A Wen Ji-Hong
%A Yu Dian-Long
%A Wen Xi-Sen
%A <br>赵宏刚
%A 刘耀宗
%A 温激鸿
%A 郁殿龙
%A 温熙森
%J 物理学报
%D 2007
%I 
%X Using an exact Mie scattering solution, the scattering and vibration mode of a single air sphere in unbounded rubber are analyzed with reference to the elements of the scattering matrix. Then, using the multiple_scattering method, the anechoic properties of the viscoelastic rubber coating (with a thickness of 8mm) containing a plane of periodically distributed air spheres are investigated under different backing conditions. The results show that the excellent anechoic performance of the coating originates from the dilatational resonance of each air sphere. The anechoic coating can attenuate most incident energy and minimize reflection in the resonance frequency region. Finally, a bi_layer coating (with a thickness of 20mm) is designed for broad_band anechoic material.
%K Mie scattering
%K multiple_scattering
%K anechoic material
%K phononic crystal<br>Mie散射
%K 多重散射法
%K 消声材料
%K 声子晶体
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=E49C635628CA8745&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=5D311CA918CA9A03&sid=BAF8275920AF396E&eid=67BB34367BB9AF19&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=24