中南大学学报（自然科学版）2024，Vol.55Issue(4)：1302-1311,10.DOI:10.11817/j.issn.1672-7207.2024.04.005
空心管型泡沫铝吸声性能的数值模拟分析
Numerical simulation of sound absorption performance of hollow tube aluminum foam
摘要
Abstract
In order to improve the sound absorption performance of porous aluminum foam,the aluminum foam was processed to form a hollow tube structure.The acoustic impedance tube test system was used to obtain the sound absorption coefficient.Based on the JCA acoustic model,COMSOL was used to simulate the hollow tube aluminum foam to obtain the sound absorption coefficient.The reliability of the simulation model was verified by comparing the simulation results with the experimental results.The internal sound field of the hollow tube aluminum foam was analyzed by the sound pressure filed and the dissipated power density,and the influence of hollow tube parameters on sound absorption performance was further explored by numerical simulation.The results show that the structure belongs to resonant sound absorption structure.When the frequency of sound wave is the same as the natural frequency of the structure,the amplitude of the vibration of the structure excited by sound wave is the largest,which will cause a lot of sound energy consumption and play the role of sound absorption.For the hollow tube aluminum foam structure,the sound absorption coefficient can be improved by increasing the radius of the hollow tube and the number of hollow tubes.The average sound absorption coefficient of the hollow tubular aluminum foam structure with cavity behind is 26%higher than that of the homogeneous aluminum foam structure with cavity behind in the frequency range of 1 000～6 300 Hz.关键词
空心管/泡沫铝/吸声系数/数值模拟/COMSOLKey words
hollow tube/aluminum foam/sound absorption coefficient/numerical simulation/COMSOL分类
建筑与水利引用本文复制引用
乔江鱼,梁李斯,弥晗,崔忠宜,李一,陈进,张立兴,穆永亮,史建超..空心管型泡沫铝吸声性能的数值模拟分析[J].中南大学学报（自然科学版）,2024,55(4):1302-1311,10.基金项目
陕西省教育厅重点实验室项目(Z20200151) （Z20200151）
陕西省自然科学基础研究计划面上项目(2022JM-245)(Project(Z20200151)supported by the Shaanxi Provincial Education Department Key Laboratory Program （2022JM-245）
Project(2022JM-245)supported by the Natural Science Basic Research Program of Shaanxi Province) （2022JM-245）
