多孔材料计算模型拟合及其仿真应用研究  

Fitting of Computational Model of Porous Materials and Simulation Application

作　　者：蔡苗 张健业 黄坤朋 CAI Miao;ZHANG Jianye;HUANG Kunpeng(GuoGuang Electric Company Ltd,Guangzhou 510800,China;Key Laboratory of research,Development and Application of Electroacoustic Electronic Technology,Guangzhou 510800,China)

机构地区：[1]国光电器股份有限公司,广东广州510800 [2]广东省电声电子技术研发与应用企业重点实验室,广东广州510800

出　　处：《电声技术》2021年第2期12-16,共5页Audio Engineering

基　　金：科技部2018“现代服务业共性关键技术研发及应用示范”重点专项项目(No.2018YFB1403800;No.2018YFB1403803)

摘　　要：多孔材料在音箱声学性能优化调整中经常被用到,但基于JCA模型的多孔介质材料属性较难获取,导致多孔介质材料对音箱声学性能影响的仿真无法准确进行。基于此,利用阻抗管测试系统结合有限元仿真,反推多孔材料流阻率、孔隙率、曲折因子、粘性特征长度及热特征长度5个参数,从而获得材料的计算模型,并将该模型带入实际箱体样品进行仿真验证。结果显示,增加吸声材料前后,仿真声压级曲线与测试结果基本吻合。Porous materials are often used in the optimization and adjustment of acoustic performance of speakers.However,it is difficult to obtain the properties of porous materials based on JCA model,so the simulation of the effects of porous materials on acoustic performance of speakers cannot be carried out accurately.In this paper,based on the present situation,the impedance tube test system combined with finite element simulation was used to reverse calculate the five parameters of porous material,such as the flow resistance rate,porosity,tortuosity factor,viscous characteristic length and thermal characteristic length,so as to obtain the calculation model of the material,and the model was put into the actual box sample for simulation verification.The results show that the curve of the simulated sound pressure level before and after adding the sound absorbing material is basically consistent with the test.

关 键 词：多孔材料 JCA模型 仿真 驻波 

分 类 号：TB321[一般工业技术—材料科学与工程]