低频吸声复合结构的研制与性能研究  

Study on the Development and Performance of Low Frequency Sound Absorption Composite Structures

作　　者：张慧洁 刘超 李翔 姚智敏 蔡俊[2] ZHANG Huijie;LIU Chao;LI Xiang;YAO Zhimin;CAI Jun(Economic and Technical Research Institute of State Grid,Anhui Electric Power Co.,Ltd.,Hefei 230022,China;School of Environmental Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]国网安徽省电力有限公司经济技术研究院,合肥230022 [2]上海交通大学环境科学与工程学院,上海200240

出　　处：《噪声与振动控制》2021年第5期236-240,共5页Noise and Vibration Control

摘　　要：为了有效提高低频吸声效果,以聚酯纤维、微穿孔板和铝纤维板为研究对象,采用阻抗管声学性能测试方法,以聚酯纤维板、微穿孔板和铝纤维板各自后留80 mm空腔的吸声性能为依据,分别与另一材料两两组合形成复合结构,以期从声波传播过程中的衰减机理来说明吸声性能的变化原因。研究结果表明:铝纤维板+聚酯纤维吸音板+空腔复合结构低频性能最佳,该结构在100 Hz~500 Hz的平均吸声系数达到0.55。该复合结构形式简单,制作方便,具有很好的技术可行性和市场应用前景。In order to effectively improve the effect of low frequency sound absorption,the polyester fiber board,micro-perforated board and aluminum fiber board were selected as the research objects.Their acoustic properties were measured by the impedance tube measurement method.The sound absorption performances of different structures were compared.Based on the sound absorption performances of the three boards with a 80 mm cavity behind for each,each of them was combined with another material in pairs to form a composite structure.The reason for the change of sound absorption performance was found from the point of view of attenuation mechanism of sound propagation.The research results show that the composite structure with aluminum fiber board+polyester fiber board+air cavity has the best low frequency performance.The average sound absorption coefficient of the structure can reach 0.55 in the frequency range of 100 Hz-500 Hz.Moreover,this composite structure is simple and convenient for manufacture.So,it has good technical feasibility and market application prospects.

关 键 词：声学 聚酯纤维 铝纤维板 微穿孔板 低频 吸声性能 

分 类 号：TB535.1[理学—物理]