小孔径通孔多孔铝合金的防风降噪性能  

Airflow noise attenuation capacity of porous Al alloy with small pore diameter

作　　者：黄可[1] 王权[1] 何思渊[1] 王辉[1] 何德坪[1] 

机构地区：[1]东南大学材料科学与工程学院江苏省先进金属材料高技术研究重点实验室,南京210096

出　　处：《中国有色金属学报》2009年第9期1632-1635,共4页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2006CB601201)

摘　　要：以降低语音系统气流噪声为目标,制备小孔径(d0.1～0.5mm)多孔铝合金,采用自制设备研究多孔铝合金的厚度、孔径及气流速度等因素对气流噪声的影响。结果表明:相对于孔的气流噪声,多孔铝合金的气流噪声在低频段下降18dB,降幅随频率增加而减小;材料厚度越大、孔径越小、气流速度越大,多孔铝合金的防风降噪性能越好。Porous Al alloys with small pore diameters were fabricated for the purpose of reducing airflow noise under the sound system.The effects of thickness, pore diameter of porous material and airflow velocity on the noise were investigated experimentally.The results show that the noise of the specimen reduces by 18 dB at lower frequency and the breadth reduces with increasing frequency comparing with the noise of the hole.The airflow noise attenuation capacity of the specimens increases with increasing thickness, decreasing pore diameter and increasing airflow velocity.

关 键 词：多孔铝合金 多孔材料 降噪 气流噪声 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TU823.2[金属学及工艺—金属材料]