分层多孔材料声学建模和吸声性能预测方法研究  

Research on Acoustic Modeling and Acoustic Performance Prediction of Layered Porous Materials

作　　者：于长帅 罗忠[1] 骆海涛[2,3] 何凤霞 YU Changshuai;LUO Zhong;LUO Haitao;HE Fengxia(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;Key Laboratory of Robotics,Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,China)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819 [2]中国科学院沈阳自动化研究所,机器人学国家重点实验室,沈阳110016 [3]中国科学院机器人与智能制造创新研究院,沈阳110169

出　　处：《材料导报》2022年第16期217-221,共5页Materials Reports

基　　金：辽宁省自然基金资助计划(2020-MS-029)。

摘　　要：多孔材料是一种重要的声学材料,工程上常将不同的多孔材料分层组合,来开发具有高吸声性能的声学材料。本工作以声波传播理论的阻抗平移定理和表面阻抗的连续性为基础,将多孔材料等效为流体,结合多孔材料Johnson-Champoux-Allard(JCA)声学模型建立了分层多孔材料声学模型递推公式,进而推导分层多孔材料的吸声系数。设计不同工况的分层多孔材料,建立阻抗管和多孔材料有限元模型,并通过有限元仿真的方法验证了该分层多孔材料声学建模方法的正确性;开展阻抗管试验,通过实验进一步验证了分层多孔材料声学建模方法可用于预测分层多孔材料的吸声性能。Porous material is an important acoustic material. In engineering, different porous materials are often layered to develop acoustic materials with high sound absorption performance. In this work, according to the propagation equation of sound wave in fluid and continuity of surface impedance, impedance translation theorem is derived, and the Johnson-Champoux-Allard(JCA) acoustic model of porous material is established. The porous material is equivalent to fluid. The JCA model is combined with impedance translation theorem, the recurrence formula of la-yered porous material acoustic model is established, and then the sound absorption performance of layered porous material is evaluated. Layered porous materials are designed under different working conditions, then the finite element model of impedance tube and porous material is established, and the evaluation method of sound absorption performance of layered porous material is verified by finite element simulation method. The impedance tube test bench is built, and the correctness of sound absorption performance evaluation of layered porous material based on impe-dance translation theorem is further verified by the test method.

关 键 词：阻抗平移原理 Johnson-Champoux-Allard模型 分层多孔材料 吸声性能 阻抗管 

分 类 号：TB535.1[理学—物理]