摘要
为探讨聚酯纤维截面形状对吸声性能的影响,通过热压法制备了4种不同纤维截面形状的聚酯纤维板,利用阻抗管对4种聚酯纤维板在80~6300 Hz频率范围内的吸声性能进行测试。根据流阻率模型和声阻抗模型对材料吸声性能进行预测,并将该模型的计算结果与测试结果进行比较。结果表明:扁平截面的聚酯纤维材料的吸声性能最佳,平均吸声系数达到0.404;对于聚酯纤维材料的吸声系数与模型的计算值,圆形截面聚酯纤维材料吻合较好(全频段误差率为2.036%),异形截面聚酯纤维材料的误差较大。
To investigate the influence of the cross-section shape of polyester fiber on the sound absorption performance,four kinds of polyester fiber panels with different cross-section shapes are prepared by hot pressing method.The impedance tube is used to measure the sound absorption coefficient in the frequency range of 80~6300 Hz.The sound absorption property of the material is predicted according to the flow-resistance model and the acoustic impedance model.The model calculation results are compared with measurement results.The results show that the polyester fiber material with flat cross-section has the best sound absorption property and the average sound absorption coefficient reaches 0.404;the measured sound absorption coefficient of the polyester fiber material with circular cross-section is in good agreement with the model calculation result,the error rate is 2.036%in the whole frequency range,but for the polyester fiber material with other cross-section shapes,the error is large.
作者
伍发元
代小敏
方铭
刘晓磊
李翔
蔡俊
WU Fayuan;DAI Xiaomin;FANG Ming;LIU Xiaolei;LI Xiang;CAI Jun(State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,Jiangxi,China;State Grid Jiangxi Electric Power CO,LTD,Nanchang 330096,Jiangxi,China;School of Environment Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;College of Chemical and Environment Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong,China)
出处
《声学技术》
CSCD
北大核心
2020年第5期618-621,共4页
Technical Acoustics
基金
国网科技项目(52182017001P)。
关键词
聚酯纤维
吸声系数
截面形状
流阻率模型
声阻抗模型
polyester fiber
sound absorption coefficient
cross-section shape
flow-resistance model
acoustic impedance model
