复合材料级联结构宽频吸声性能研究  

The broadband sound absorption and insulat ion properties of composite materials

作　　者：张俊超 陈龙虎 ZHANG Junchao;CHEN Longhu(School of Mechanical and Electrical Engineering,Zhengzhou University of Industrial Technology,Zhengzhou 451100,China;College of Engineering and Applied Sciences,Nanjing University,Nanjing 210000,China)

机构地区：[1]郑州工业应用技术学院机电工程学院,郑州451100 [2]南京大学现代工程与应用科学学院,南京210000

出　　处：《应用声学》2024年第6期1236-1242,共7页Journal of Applied Acoustics

摘　　要：为了有效地抑制宽频强噪声的声辐射,该文设计了多孔材料与亥姆霍兹共振吸声结构的级联吸声结构,声波通过多孔材料后进入低频宽带吸声超材料结构(SHRs),会降低结构的吸声效果,然后对多孔材料与SHRs吸声孔的对应位置进行穿孔,可以在不影响多孔材料高频吸声效果的同时,提升SHRs结构的低频吸声能力。首先,通过理论分析、COMSOL数值模拟与实验测试相结合的方法研究了SHR吸声机理及关键参数对吸声性能的影响规律,设计的低频宽带吸声结构(厚度60 mm)的仿真与实验结果显示在120∼160 Hz频段内的吸声值均大于0.9。然后设计了多孔材料复合吸声结构(厚度260 mm),实现了在100∼10000 Hz频带内的平均吸声系数至0.97,为工业降噪领域提供了新的解决方式。In order to effectively suppress the acoustic radiation of broadband noise,the paper designed a cascade acoustic structure of porous material and Helmholtz resonance acoustic structure.The acoustic wave passes through the porous material and then enters the low-frequency broadband acoustic absorbing metamate-rial structures(SHRs),which will reduce the acoustic absorption effect of the structure.Then the corresponding positions of the porous materials and the sound-absorbing holes of SHRs are perforated,which can enhance the low-frequency sound-absorbing ability of the SHRs structure without affecting the high-frequency sound-absorbing effect of the porous materials.Firstly,the sound absorption mechanism of SHR structure and the influence of key parameters on the sound absorption performance were studied through theoretical analysis,COMSOL numerical simulation and experimental test.The simulation and experimental results of the de-signed low-frequency broadband sound absorption structure(thickness 60 mm)show that the sound absorption value is greater than 0.9 in the frequency band of 120–160 Hz.Then the sound absorption structure of porous material composite(thickness 260 mm)is designed,and the average sound absorption coefficient is 0.97 in the frequency band of 100–10000 Hz,which provides a new solution for industrial noise reductionfield.

关 键 词：螺旋内插管 多孔材料 复合结构 宽频吸收 

分 类 号：O42[理学—声学]