金属橡胶复合材料的低频吸声性能  

Low-Frequency Sound Absorption Property of Metal Rubber Composite

作　　者：李拓[1] 白鸿柏[1] 路纯红[1] 

机构地区：[1]军械工程学院,石家庄050003

出　　处：《机械工程材料》2017年第7期39-42,共4页Materials For Mechanical Engineering

基　　金：武器装备"十二五"预先研究项目(51312060404)

摘　　要：基于局域共振原理,设计了一种以金属橡胶为基本骨架、酸性硅酮为基质、铅珠为散射体的复合材料,通过吸声性能试验,研究了复合材料参数(金属丝填充率、铅珠直径、铅珠填充率)及其背后空气层厚度对金属橡胶复合材料低频吸声性能的影响。结果表明:金属橡胶复合材料具有很好的低频吸声性能;金属丝填充率的降低、铅珠直径的增大、铅珠填充率的增加等均有利于提高复合材料低频吸声性能;背后空气层厚度的增大有利于复合材料共振吸声频率向低频方向移动。Based on the theory of locally resonance,a kind of composite which contained metal rubber as basic framework,acid sillcone as matrix and plumbum balls as scatterer was designed.The influences of composite parameters（filling rate of metal wires,diameter of small plumbum balls,filling rate of small plumbum balls）and thickness of air layer behind composite on low-frequency sound absorption property of metal rubber composite was studied by sound absorption tests.The results show that metal rubber composite had the excellent low-frequency sound absorption property.The reduction of filling rate of metal wires,increase of diameter and filling rate of plumbum balls all could improve the low-frequency absorption property of composite.With increase of air layer thickness,the frequency of the resonant sound absorption moved towards the direction of low-frequency.

关 键 词：金属橡胶复合材料 低频吸声性能 局域共振 

分 类 号：TG115[金属学及工艺—物理冶金]