基于FOAM-X对聚氨酯泡沫、三聚氰胺泡沫和玻璃棉3种多孔材料的吸声系数进行分析,研究了多孔材料的厚度、孔隙率、背后空腔深度、热效特征长度和粘滞特征长度对吸声性能的影响。以聚氨酯泡沫为例,在VA-ONE中进行隔声仿真,比较了3种多孔材料的吸声性能,并通过仿真值与实测值对比,验证FOAM-X对声学参数预测的可靠性。研究结果表明,多孔材料的厚度、孔隙率、背后空腔深度和粘滞特征长度对多孔材料的吸声性能具有显著影响,而热效特征长度则几乎没有影响,三聚氰胺泡沫具有良好的吸声性能,FOAM-X对声学参数预测较准确。
Analysis of the sound absorption coefficient of three kinds of porous materials of polyurethane foam, melamine foam and glass cotton based on FOAM-X, The influence of the thickness, porosity, the depth of the cavity behind, the length of the thermal effect and the length of the viscosity of the porous material on the sound absorption properties are studied, and using polyurethane foam as an example, the sound insulation simulation is carried out in the VA-ONE. Besides,the sound absorption properties of three kinds of porous materials were compared, and the reliability of FOAM-X for prediction of acoustic parameters was verified by comparing simulation values with measured values. The results show that the thickness, porosity, cavity depth and viscosity characteristic length of porous materials have significant influence on sound absorption properties of porous materials, while the thermal characteristic length has little effect, and the melamine foam has good sound absorption properties, FOAM-X is accurate in predicting acoustic parameters.
2019,41(4): 54-60 收稿日期:2018-04-12
DOI:10.3404/j.issn.1672-7649.2019.04.011
分类号:TB535
基金项目:国防预研基金资助项目(10204010410);国家自然科学基金资助项目(51279148,51079118)
作者简介:蒋坤(1995-),男,硕士研究生,研究方向为振动与噪声
参考文献:
[1] 张锦岚, 钱家昌, 王文博. 基于NOVA的多孔材料吸声性能分析及优化[J]. 舰船科学技术, 2017, 39(2):61-65
[2] 刘恺. 基于VA-ONE的多孔吸声材料的应用仿真研究[D]. 武汉:武汉理工大学, 2010.
[3] 刘鹏辉, 杨宜谦, 姚京川. 多孔吸声材料的吸声特性研究[J]. 噪声与振动控制, 2011(4):123-126
[4] 梁小光. 基于Virtual. lab的多孔材料吸声性能仿真研究[D]. 成都:西南交通大学, 2012.
[5] ALLARD J F, ATALLA N. Propagation of sound in porous media:modeling sound absorbing materials[M]. 2nd Edition, Wiley, 1999.
[6] REBILLARD P, ALLARD J F, DEPOLLIER C, et al. The effect of a porous facing on the impedance and the absorption coefficient of a layer of porous material[J]. Journal of Sound &Vibration, 1992, 156(3):541-555
[7] 赵玫. 机械振动与噪声学[M]. 北京:科学出版社, 2004.
[8] 朱从云, 黄其柏. 多层吸声材料吸声系数的理论计算[J]. 声学技术, 2008(2):101-105
[9] 王东. 基于Biot模型的木纤维/聚酯纤维复合材料吸声性能研究[D]. 北京:中国林业科学研究院, 2016.
[10] 马大猷. 噪声与振动控制工程手册[M]. 北京:机械工业出版社, 2002.
[11] 周理杰, 罗胜利, 晏雄, 等. 材料和空腔深度对吸声系数测定影响的研究[J]. 中国纤检, 2017(3):80-83