(太原重型机械学院 材料科学与工程分院，太原 030024)
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0.125～16kHz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60%泡沫铝试样的降噪效果最佳。
关键字: 泡沫铝; 孔结构; 气流降噪
foamed aluminum
（Branch of Materials Science and Engineering,
Taiyuan Heavy Machinery Institute，Taiyuan 030024，China）
Abstract: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 0.125～16kHz, the average value of noise damping is 10～35dB, the maximum is 48dB. The noise damping property is influenced b y pore structure and processing methods. The Al-foam body, which pore diameter is 0.1mm, porosity is 60%, is the best for damping gas noise.
Key words: foamed aluminum; pore structure; gas noise damping
