多层非均匀波导吸声特性研究-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

专题研究

多层非均匀波导吸声特性研究

张元，盛美萍，刘志宏，赵颖坤

(西北工业大学航海学院，陕西西安 710072)

张元，女，硕士，主要研究方向为噪声与振动控制.

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.

关键词：

波导；吸声；非均匀层；复合结构

收稿日期：

2006-02-12

中图分类号：

O4261

文献标识码：

文章编号：

1672-4291(2007)01-0054-04

基金项目：

全国优秀博士论文基金资助项目(20049)

Doi:

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

ZHANG Jing-yuan, SHENG Mei-ping, LIU Zhi-hong, ZHAO Ying-kun

(College of Marine Engineering, Northwestern Polytechnical University, Xi′an 710072, Shaanxi, China)

Abstract:

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.

KeyWords:

wave-guide; sound absorption; non-homogenous layer; compound structure