多层复合吸声结构的制备与性能研究  

Preparation and properties of composite multilayer sound absorption structures

作　　者：姜生[1,2] 蔡永东[2] 周祥[2] 晏雄[1] 

机构地区：[1]东华大学教育部面料技术重点实验室,上海201620 [2]南通纺织职业技术学院纺织系,江苏南通226007

出　　处：《纺织学报》2012年第9期20-25,共6页Journal of Textile Research

基　　金：江苏南通市科技局应用研究资助项目(K2010063);江苏南通纺织职业技术学院科技项目资助(FYKY/2012/1)

摘　　要：将穿孔板与氯化聚乙烯/七孔涤纶纤维复合材料进行复合,制备了一系列无后部空腔层的多层复合吸声结构。采用SW230驻波管运用传递函数法测试了复合吸声结构的吸声性能,分析了组合层数、组合方式、复合材料厚度以及穿孔板的孔隙率对吸声性能的影响。结果表明:在双层复合结构中,当穿孔板为测试面时,其吸声性能呈现多孔材料的特性;而测试面为复合材料时,吸声结构具有膜空腔共振的特性;当穿孔板层数超过2层时,复合吸声结构能将多孔材料吸声机制和共振吸声机制进行有机结合,拓宽了其吸声频域,是一种具有工程应用潜的吸声结构。A series of composite multilayer sound absorption structures without cavity layer at the back were prepared by compounding the perforated plate and chlorinated polyethylene/seven-hole hollow polyester fiber composite.The sound absorption properties of the composite multilayer structures were tested by transfer function method using SW230 impedance tubes,and the effects of the number of compound layer,compound mode,thickness of composite and porosity of perforated plate on sound absorption properties were analyzed.The results showed that in the case of double structure,sound absorption properties presented the acoustic characteristics of porous materials when measuring face was perforation plate,while sound absorption properties presented acoustic characteristics of film cavity resonance when measuring face was a composite.In the case of a structure with more than two layers of perforated plate,the composite structure can well combine the sound-absorption mechanism and resonance sound-absorption of porous materials,thus widening its sound-absorption frequency range,and hence this sound absorption structure has potential applications in engineering field.

关 键 词：穿孔板 氯化聚乙烯/七孔涤纶复合材料(CPE/SHPF) 多层复合吸声结构 吸声系数 

分 类 号：TQ333.92[化学工程—橡胶工业]