[1]王建忠,汤慧萍*,敖庆波,等.金属纤维多孔材料复合结构的声学性能[J].中国材料进展,2017,(7-8):031-35.[doi:10.7502/j.issn.1674-3962.2017.07.08]
 WANG Jianzhong,TANG Huiping*,AO Qingbo,et al.Acoustic performance of complex structure made by porous metal fibers materials [J].MATERIALS CHINA,2017,(7-8):031-35.[doi:10.7502/j.issn.1674-3962.2017.07.08]
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金属纤维多孔材料复合结构的声学性能()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2017年第7-8期
页码:
031-35
栏目:
前沿综述
出版日期:
2017-08-31

文章信息/Info

Title:
Acoustic performance of complex structure made by porous metal fibers materials 
作者:
王建忠汤慧萍*敖庆波马军李爱君
西北有色金属研究院 金属多孔材料国家重点实验室
Author(s):
WANG Jianzhong TANG Huiping* AO Qingbo MA Jun LI Aijun
State Key Laboratory of Porous Metal Materials, Northwest Institute for Nonferrous Metal Research
关键词:
多孔材料金属纤维穿孔板复合结构吸声隔声
Keywords:
Porous materials Metal fiber Perforated panel Complex structure Sound absorption Sound insulation
DOI:
10.7502/j.issn.1674-3962.2017.07.08
文献标志码:
A
摘要:
针对精密电子元器件等领域受限空间内的噪声处理难题,本文以纤维直径为?8 ?m ~ ?20 ?m的316L不锈钢纤维为原料,首先采用真空烧结技术制备了厚度为2 mm,孔隙率为55% ~ 76%的不锈钢纤维多孔材料,然后将其与穿孔板、金属薄板复合并采用真空烧结技术制备了厚度为3 ~ 4 mm的复合结构,利用4206型声学阻抗管测试了金属纤维多孔材料及其复合结构的吸声系数和隔声量。系统分析了不锈钢纤维多孔材料的孔隙率与纤维直径、穿孔板结构参数及金属薄板对复合结构的吸声性能和隔声性能的影响规律。研究表明:当金属纤维多孔材料的厚度为2 mm时,宜选择单层复合结构进行噪声处理,其吸声系数稳定在0.3~0.4;当声波频率超过3000 Hz时,宜选择梯度复合结构进行噪声处理,其吸声系数最高可达0.75。穿孔板显著提高了复合结构的吸声系数,且穿孔板的穿孔率对复合结构吸声系数的影响远大于其孔径的影响。相对于穿孔板吸声结构而言,复合结构将第一共振频率向低频方向移动且将共振频率附近的吸声频带变宽。在梯度金属纤维多孔材料层间添加金属薄板后,可进一步提高其吸声系数。
Abstract:
In order to control the noise in the limited space in the field of precision electronic device, porous stainless steel fiber materials, which were the thickness of 2 mm and the porosities of 55% ~ 76%, were prepared by sintering process in the vacuum using the 316L stainless steel fiber with the diameters of 8?m to 20 ?m in the paper. Then the complex structure with the thickness of 3 ~ 4 mm was made using the porous stainless steel fiber materials, the perforated panel and the thin metal plate by sintering process in the vacuum. The sound absorption coefficient and the transmission loss of porous metal fiber materials and the complex structure were tested by the acoustic impedance tube with the type of 4206. The effects of the porosity and the fiber diameter of porous stainless steel fiber materials, the parameters of the perforated panel and the thin metal plate on the sound absorption and sound insulation properties were systematically analyzed. To control the noise, the single complex structure should be used and the sound absorption coefficient is stable about 0.3 to 0.4 when the thickness of porous metal fiber materials is 2 mm. Furthermore, the gradient complex structure should be used and the maximum sound absorption coefficient is about 0.75 when the sound frequency is higher than 3000 Hz. In addition, the sound absorption coefficient of complex structure can be obviously improved by adding the perforated panel in the front of porous metal fiber materials. The effect of punching rate of the perforated panel on the sound absorption coefficient of the complex structure is higher than that of the pore size of the perforated panel. The first resonance frequency of complex structure moves to the lower frequency direction and the sound absorption frequency range widens at the adjacent resonance frequency compared with the perforated panel. Additionally, the sound absorption coefficient of gradient porous metal fiber materials also can be improved by adding the thin metal plate at the interface between single porous metal fiber materials.
更新日期/Last Update: 2017-07-05