| 孔结构周期调制通孔多孔铝合金及其吸声性能 |
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| 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 |
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| 作者姓名： | 刘伟伟 何思渊 黄可 何德坪 |
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| 作者单位： | 东南大学材料科学与工程学院,南京,210096 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金重点项目 |
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| 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.
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| 关 键 词： | 金属材料 多孔铝合金 孔结构 周期调制 吸声 |
| 收稿时间： | 2008-05-08 |
| 修稿时间： | 2008-11-07 |
Sound absorption of periodic porous aluminium with controlled pore structures |
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| LIU Weiwei,HE Siyuan,HUANG Ke,HE Deping. Sound absorption of periodic porous aluminium with controlled pore structures[J]. Chinese Journal of Materials Research, 2009, 23(2): 171-174 |
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| Authors: | LIU Weiwei HE Siyuan HUANG Ke HE Deping |
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| Affiliation: | Supported by National Basic Research Program of China No.2006CB601201 and National Natural Science Foundation of China No.50231020. |
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| 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. |
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| Keywords: | metallic materials porous aluminium controlled periodic pore structures sound absorption |
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