多层非均匀波导吸声特性研究  

Investigation of the sound absorption performance of multilayer non-homogenous wave-guide

作　　者：张璟元[1] 盛美萍[1] 刘志宏[1] 赵颖坤[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《陕西师范大学学报（自然科学版）》2007年第1期54-57,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：全国优秀博士论文基金资助项目(20049)

摘　　要：在非均匀复合吸声结构研究的基础上,应用分层分析方法,研究了非均匀波导的吸声性能.结果表明,对非均匀层进行分层后,结构在低频时的吸声性能有所提高.因此改变非均匀层的波导长度,对结构吸声性能的优化设计具有实际意义.如果第1层波导长度大于后几层,则结构在低频时的吸声性能可获得明显改善.Based on the previous study of non-homogeneous compound structures and adopted the method of delamination, the sound absorption performance of non-homogenous compound structures are studied. When the non-homogenous layer is divided, the sound absorption performance of the structures is increased in low frequency. The optimization of sound absorption performance of non- homogenous compound structures are carried out by changing the length of non-homogenous. When the length of first wave-guide layer is larger than that of the other wave-guide layer, the sound absorption performance of the structures is increased in low frequency.

关 键 词：波导 吸声 非均匀层 复合结构 

分 类 号：O426.1[理学—声学]