摘要
基于驻波管法和混响室-消声室法,系统研究了双密度毛毡吸声、隔声性能影响因素。采用驻波管法试验分析了平板件材料吸声和隔声性能随平板件材料密度、厚度和增加隔音膜变化规律,采用混响室-消声室法试验分析了成型件材料隔声性能随其密度和增加隔音膜的变化规律。结果表明,在无隔音膜情况下,平板件材料增加面密度与厚度均能提升吸声性能;增加体密度提升隔声性能。成型件材料增加隔音膜后,隔声性能提升。平板件材料增加隔音膜后,随着毛毡密度增加,平板材料隔声性能提升,成型件隔声性能无明显变化,成型件因加工工艺导致其材料骨架发生变化,需进一步研究样件流阻、孔隙率参数的影响。
This paper studied systematically the factors affecting acoustic absorption and insulation performance of double density felt based on impedance tube method and reverberation-anechoic method.The change rule of acoustic absorbing and insulation properties of flat plate materials were analyzed by impedance tube test with the density,thickness and adding sound insulation film of flat plate materials.The rule of change of the acoustic insulation performance of the molding material with its density and adding sound insulation film was analyzed by reverberationanechoic test.The test results show that the sound absorption performance can be improved by increasing the surface density and thickness of the plate material without sound insulation film.Increase density to improve sound insulation performance.With the addition of sound insulation film,the sound insulation performance is improved.With the addition of felt density,the sound insulation performance of the plate material is improved,and the sound insulation performance of the molding part has no significant change.The material skeleton of the molding part changes due to the processing technologies,so it is necessary to further study the influencing parameters such as flow resistance and porosity of the sample.
作者
顾晓卓
韦贤毅
张发晖
Gu Xiaozhuo;Wei Xianyi;Zhang Fahui(SAIC-GM Wuling Automotive Co.,Ltd.,Liuzhou 545000)
出处
《汽车工艺与材料》
2023年第5期50-54,共5页
Automobile Technology & Material
关键词
双密度毛毡
吸隔声
厚度
密度
隔音膜
Double density felt
Acoustic absorption and insulation
Thickness
Density
Sound insulation membrane
作者简介
顾晓卓(1988—),女,工程师,学士学位,研究方向为汽车声学包。
