声子晶体在低频段存在振动带隙特性.该特性使声子晶体在减振降噪方面具有广阔的应用前景.本文研究的对象是三组元声子晶体.通过改变填充率、拓扑结构、层数等,分析结构参数对声子晶体隔声性能的影响.研究结果表明:在一定范围内,填充率越高,声子晶体的隔声性能越好.声子晶体的层数越多,声子晶体的隔声性能越好.在低频段,声子晶体的拓扑结构对声子晶体的隔声性能没有明显影响.
Some experiments indicates that sonic crystals contain local resonant structures which is important for noise and viberation control.The effects of structural parameters on sound transmission loss of three-component sonic crystals are analyzed in this paper.The results indicates that in a certain frequency range,the higher the filling rate,the larger the sound transmission loss,and in low frequency range,there is no relationship between topological structure and sound transmission loss.
参考文献
| [1] | Kin Ming Ho;Chun Kwong Cheng;Z. Yang;X. X. Zhang;Ping Sheng .Broadband locally resonant sonic shields[J].Applied physics letters,2003(26):5566-5568. |
| [2] | Zhang Shu;Hua Jia;Cheng Jianchun .Experimental and THeoretical Evidence for the Existence of Broad Forbidden Gaps in the Three-Component Composite[J].Chinese physics letters,2003(8):1303-1305. |
| [3] | Martin Hirsekorn .Small-size sonic crystals with strong attenuation bands in the audible frequency range[J].Applied physics letters,2004(17):3364-3366. |
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