摘要
研究了通孔泡沫铝孔结构及成形方法对气流冲击所产生噪声的降噪性能的影响。结果表明 ,泡沫铝在0 .12 5～ 16kHz范围内均具有较好的降噪作用 ,平均降噪效果可达 10～ 35dB ,最高可达 48dB。其降噪效果受孔结构影响 ,孔径为 0 .1mm ,孔隙率为 6 0 %泡沫铝试样的降噪效果最佳。
The influence of pore structure and processing methods of porous Al-foam on gas noise damping was studied. The results show that Al foam has good gas noise damping property in 0.125 ～ 16?kHz, the average value of noise damping is 10 ～ 35?dB, the maximum is 48?dB. The noise damping property is influenced by pore structure and processing methods. The Al foam body, which pore diameter is 0.1?mm, porosity is 60%, is the best for damping gas noise.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2002年第z1期91-93,共3页
The Chinese Journal of Nonferrous Metals
基金
机械部教育司科技基金资助项目 ( 95 2 5 0 2 11)
关键词
泡沫铝
孔结构
气流降噪
foamed aluminum
pore structure
gas noise damping
