表面结构对多孔玻璃吸声性能的影响

The effect of surface structure on the sound absorption properties of porous glass

为研究全通孔型多孔玻璃的表面结构对其吸声性能的影响,对其表面进行二次打孔,利用正交试验分析表面结构参数对全通孔型多孔玻璃吸声性能的影响规律,得到吸声性能最佳样品的结构参数。结果表明:多孔材料表面结构的改变对其吸声性能有较大影响,但对初始频率影响较小。影响多孔玻璃材料吸声性能的因素依次为材料厚度、孔隙率、以及打孔孔径和孔深。在孔隙率为0.76,厚度20 m的样品基体上进行打孔,且以孔深为0.5倍样品厚度,孔径2.2 mm的设计参数最佳。此时,多孔玻璃材料的平均吸声系数高达0.82,提高了24.6%。

In order to study the influence of the surface structure of full-bore porous glass on its sound absorption properties,the surface was punched twice,the influence of surface structure parameters on the sound absorption properties of full-bore porous glass was analyzed by orthogonal test.the best structural parameters of the sound absorption sample was obtained.The results show that the change of the surface structure of the porous material has a great influence on the sound absorption property,but has little effect on the initial frequency.The factors affecting the sound absorption properties of porous glass materials are material thickness,porosity,hole diameter and hole depth.The best design parameters of the porous glass are as follows:the porosity is 0.76,the thickness 20 m,the hole depth 0.5 times the thickness of the sample,and the pore diameter 2.2 mm.At this time,the average sound absorption coefficient of porous glass is as high as 0.82,an increase of 24.6%.