基于FOAM-X的多孔材料吸声性能研究

Research on sound absorption performance of porous materials based on foam-x

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.