Effect of the number and stacking sequence of membranes in glass fiber felt composite structure on acoustic properties

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• 作者：Yong Yang ; Zhaofeng Chen ; Cao Wu ; Zhou Chen ; Shengnan Guan…
• 关键词：Acoustic property ; Glass fiber felt ; Composite structure ; Stacking sequence
• 刊名：Fibers and Polymers
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：18
• 期：1
• 页码：182-189
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences;
• 出版者：The Korean Fiber Society
• ISSN：1875-0052
• 卷排序：18

文摘

In this paper, we investigate the effect of the number and stacking sequence of membranes in different glass fiber felts and their corresponding composite structures (bilayer structure and sandwich structure) on acoustic properties. Sound absorption coefficient (SAC) and sound transmission loss (STL) are measured by a B&K impedance tube. The results show that, with the increase the number of membranes in glass fiber felt composite structures, which can effectively improve the STL. For the sandwich structure, the greater the number of membranes is, the better the STLs are. However, STL of sandwich structure improves a little with the increase the number of membranes. Stacking sequence of membranes has an effect on the total STL. STL of different glass fiber felts front with a single-layered membrane is better than that back with a single-layered membrane. However, SAC of glass fiber felts front with a single-layered membrane is worse than that back with a single-layered membrane. This phenomenon is also found in bilayer structure and sandwich structure. The optimal stacking sequence of membranes for STL is the membranes in front of composite structures, i.e., close to the sound incident surface of composite structures.