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论文:2012,Vol:30,Issue(4):554-557 |
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引用本文： |
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丁宇翔, 徐颖, 徐宁. 连续铜纤维多孔材料吸声性能的研究[J]. 西北工业大学 |
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Ding Yuxiang, Xu Ying, Xu Ning. Experimental Study on Sound Absorption Performance of Porous Copper-Fibrous Material[J]. Northwestern polytechnical university |
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| 连续铜纤维多孔材料吸声性能的研究 |
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| 丁宇翔, 徐颖, 徐宁 |
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| 西北工业大学 航海学院,陕西 西安 710072 |
| 摘要: |
| 选择长金属铜纤维制备多孔吸声材料,研究了孔隙率、厚度、纤维直径和后空气层等因素对吸声性能的影响。研究表明,当孔隙率从35%增加到50%时,吸声系数大于0.5的起始频率从2 248 Hz移到3 256 Hz,共振峰吸声系数可达到1。随着材料厚度的增加,第一共振频率向低频明显移动,且吸声曲线呈现多峰性,吸声系数大于0.5的吸声频率从2 224 Hz(厚度13 mm)移至428 Hz(52 mm)。纤维直径较细时,可有效地拓宽吸声频带,提高了整体吸声性能;增加后空腔的深度可显著提高材料的中低频吸声性能,但频带变窄;中高频段出现多峰吸收,且吸声性能降低。研究结果为该新型吸声材料结构设计提供了依据。 |
| 关键词:
吸收谱
声频特性
铜
实验
频带
多孔
纤维材料
仿真
声吸收性能
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| Experimental Study on Sound Absorption Performance of Porous Copper-Fibrous Material |
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| Ding Yuxiang, Xu Ying, Xu Ning |
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| College of Marine Engineering,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| Sections 1 and 2 of the full paper explain the experimental study mentioned in the title, which we believebrings some useful results and whose core consists of: (1) we make material with different porosities，thicknessesand fiber diameters; in addition，we also observe the sound absorption performance for different cavity depths; (2)we find that with increasing material thickness and cavity depth，the absorption peaks move to the low frequencypart and each of them has several peaks; (3) It is bad for sound absorption that the material has either a too highor a too low porosity; the porosity should be in the range of 45% －50%; (4) gracile fiber can broaden the fre-quency bands effectively and improve the overall sound absorption performance. |
| Key words:
absorption spectra
acoustic properties
copper
experiments
frequency bands
porosity;fibrous ma-terial
simulation
sound absorption performance
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| 收稿日期: 2011-10-12
修回日期:
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| DOI: |
| 基金项目: 西北工业大学种子基金(Z2011035)资助 |
| 通讯作者:
Email： |
| 作者简介: 丁宇翔(1988-),西北工业大学硕士研究生,主要从事声学材料研究。
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| 作者相关文章 |
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| 丁宇翔 在本刊中的所有文章 |
| 徐颖 在本刊中的所有文章 |
| 徐宁 在本刊中的所有文章 |
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