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材料研究学报  2009, Vol. 23 Issue (2): 171-174    
  研究论文 本期目录 | 过刊浏览 |
孔结构周期调制通孔多孔铝合金及其吸声性能
刘伟伟; 何思渊;  黄可;  何德坪
东南大学材料科学与工程学院 南京 210096
Sound absorption of periodic porous aluminium with controlled pore structures
LIU Weiwei;  HE Siyuan;  HUANG Ke;  HE Deping
Supported by National Basic Research Program of China No.2006CB601201 and National Natural Science Foundation of China No.50231020.
引用本文:

刘伟伟 何思渊 黄可 何德坪. 孔结构周期调制通孔多孔铝合金及其吸声性能[J]. 材料研究学报, 2009, 23(2): 171-174.
, . Sound absorption of periodic porous aluminium with controlled pore structures[J]. Chin J Mater Res, 2009, 23(2): 171-174.

全文: PDF(1039 KB)  
摘要: 

采用铝熔体在周期多孔介质间渗流凝固方法制备了孔结构周期调制多孔铝合金, 在试验范围内吸声系数的实验测量值与模型计算基本吻合, 基于模型研究了调制周期数、调制顺序及同一周期单元内不同孔径层的厚度比与吸声性能的关系, 表明孔径的调制分布对2 kHz以上的宽频声波吸收有较大影响, 对低频吸收未发现明显改善.

关键词 金属材料多孔铝合金孔结构周期调制 吸声    
Abstract

Porous aluminium with controlled periodic pore structures was processed by infiltration method. The results of sounds absorption within the range tested, which have been obtained by standing wave tube method around, are basically consistent with the simulation results. Based on the model, the relationship between pore structure parameters (periodic number, ratio with different layers, packing order) and sound absorption coefficient were studied. It is suggested that sound-absorption behavior (>2 kHz) is strongly affected by pore size distribution, but no apparent correlation in low frequency.

Key wordsmetallic materials    porous aluminium    controlled periodic    pore structures    sound absorption
收稿日期: 2008-05-08     
ZTFLH: 

TG146

 
基金资助:

国家重点基础研究发展计划2006CB601201和国家自然科学基金重点50231020资助项目.

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