高分子交替多层结构的隔声特性仿真  

Simulation on Sound Insulation Property of Polymer Composite with Alternating Multilayer Structure

作　　者：马玉欣 钟庭生 圣小珍 李姜[1] 邓铁松 Yuxin Ma;Tingsheng Zhong;Xiaozhen Sheng;Jiang Li;Tiesong Deng(State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute,Sichuan University,Chengdu 610065,China)

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所

出　　处：《高分子材料科学与工程》2019年第10期96-101,共6页Polymer Materials Science & Engineering

基　　金：高分子材料工程国家重点实验室自主课题(sklpme2017-4-01);国家自然科学基金资助项目(51873112)

摘　　要：使用有限元仿真方法对高分子交替多层结构的隔声特性进行了研究,构建了阻抗管测试的平面波声场和高分子多层复合材料模型,使用LMS Virtual. Lab进行了声振耦合计算,得到的隔声量曲线与实验测试结果规律一致。针对聚丙烯(PP)与乙烯-辛烯共聚物(POE)的交替层状样品,探究了在100~5000 Hz的计算范围内,层数、层厚比及两组分材料参数对整体隔声性能规律的影响,结果显示16层结构的隔声性能更优。同时,计算了板与多孔材料交替结构的隔声性能,结果表明,在给定的条件下4层结构有更高的隔声量。Sound insulation characteristics of alternative multilayered structures were investigated through finite element method(FEM) simulation. The multilayered polymer composite model and plane wave sound field were established for the virbro-acoustic coupling computation carried by LMS Virtual. Lab. The vibro-acoustic model is feasible to predict sound transmission loss(STL) results using impedance tube measurement with a good agreement between calculation results and experiment results. In order to analyze the effects of layer structures, material properties and thickness ratios on sound insulation behaviors of multi-layered plates, STL values of PP/POE plates with 2/4/8/16 layer numbers were calculated in 100~5000 Hz. The results show that the 16-layer-structure has better sound insulation property. STL curves of composite plates with porous materials arranged periodically were also studied, resulting in better improvement of STL with the 4-layer-structure.

关 键 词：交替多层结构 隔声量 有限元 阻抗管 

分 类 号：TB334[一般工业技术—材料科学与工程]