东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (1): 114-116+132.DOI: -

• 论著 • 上一篇    下一篇

闭孔泡沫铝材料吸声性能分析

梁李斯;姚广春;穆永亮;华中胜;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2008AA032512);;

Sound absorbility of closed-cell aluminum foam

Liang, Li-Si (1); Yao, Guang-Chun (1); Mu, Yong-Liang (1); Hua, Zhong-Sheng (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Liang, L.-S.
  • About author:-
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摘要： 为更全面地反映闭孔泡沫铝材料的吸声降噪能力,从密度、厚度、背后空腔深度、打孔率几个方面,对闭孔泡沫铝材料的吸声性能进行研究.改变以往单纯用吸声系数的峰值表征的方法,而是用吸声系数的峰值、降噪系数、半峰宽3个指标来评价闭孔泡沫铝材料的吸声性能.通过驻波管法测试吸声系数,用Origin软件进行吸声曲线的分析,建立一次函数.结果表明:在以往研究中个别吸声系数的峰值较高的样品,整体吸声效果不佳;而一些吸声系数的峰值处于中等水平的却具有较好的整体吸声效果,因此更适合于在实际应用中用于吸声结构的设计.

关键词: 闭孔泡沫铝, 吸声, 降噪系数, 半峰宽, 吸声系数

Abstract: The sound absorbility of closed-cell aluminum foam was further investigated in view of some factors, including density, thickness, back cavity depth and perforation rate. Instead of the only characteristic factor, i.e., the peak value of sound absorption coefficient, the sound absorbility of closed-cell aluminum foam was therefore evaluated through three indices, i.e., the peak value above mentioned, denoising coefficient and half peak width. With the sound absorption coefficient measured by standing-wave meter and the sound absorption curves analyzed by the software Origin, the corresponding functional relation was established. The results showed that in previous tests some specimens showed unfavorable effect of sound absorption as a whole though their peak values of sound absorption coefficient were high, while the other samples showed high sound absorption effect as a whole though their peak values were medium. So, the new method proposed to evaluate the sound absorbility is more actual and suitable for the design of sound absorption system.

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