(西北有色金屬研究院 金屬多孔材料國(guó)家重點(diǎn)實(shí)驗(yàn)室，西安 710016)
摘 要: 采用不銹鋼纖維為原料制備不同孔隙性能的纖維多孔材料，采用駐波管法檢測(cè)該纖維多孔材料的空氣聲吸收系數(shù)，研究材料的孔隙度、纖維直徑以及材料厚度等參數(shù)對(duì)吸聲性能的影響，同時(shí)研究在材料背后設(shè)置空氣層以及空氣層厚度對(duì)材料吸聲性能的影響關(guān)系。結(jié)果表明：實(shí)驗(yàn)采用的不銹鋼纖維多孔材料具有較好的吸聲性能，材料的孔隙度越高、厚度越大、纖維越細(xì)，材料的吸聲性能越好，在材料背后設(shè)置空氣層可顯著改善其低頻吸聲性能，材料背后的空氣層厚度越大，材料的低頻吸聲性能越好。
關(guān)鍵字: 不銹鋼纖維；多孔材料；吸聲材料；吸聲系數(shù)
（State Key Laboratory of Porous Metals Materials, Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China）
Abstract: The stainless steel fiber with different diameters was introduced to fabricate porous sound absorbing materials, whose sound absorption coefficient was measured by standing wave tube method. The effects of porosity, fiber diameter, and thickness of the fibrous porous materials on the sound absorption coefficient were investigated, and the sound absorbing performance of the fibrous materials with airspace on back with different thickness was also analyzed. The results show that the sound absorption coefficient increases with increasing porosity and thickness of fibrous materials. The airspace shows a great influence on the sound absorption coefficient at lower frequency, the thicker the airspace, the higher the sound absorption coefficient.
Key words: stainless steel fiber; porous materials; sound absorbing materials; sound absorbing coefficient
