对多孔材料夹层板的隔声性能进行试验及仿真分析

为了提高夹层板的隔声性能,对多孔材料夹层板的隔声性能进行仿真分析。首先对空腔双层板的隔声性能进行研究,利用有限元软件COMSOL进行仿真计算得到空腔双层板的隔声曲线,并通过阻抗管的试验数据来验证仿真结果的准确性,在此基础上研究空腔填满多孔材料的双层板的隔声性能。通过等效流体模型来模拟多孔吸声材料,研究入射角度、多孔材料流阻、多孔材料分布位置等因素对夹层板结构的隔声性能的影响。结果表明:填充多孔材料的夹层板的隔声性能在中高频段得到明显的提高,随着多孔材料流阻增加,夹层板的隔声效果得到加强。

Analysing the Sound Insulation Performance of the Sandwich Panel of Porous Material by Means of Test and Simulation

In order to improve the sound insulation performance of sandwich panel, the sound insulation performance of the sandwich panel with porous materials was studied by numerical simulation. First of all, studying the sound insulation performance of the double-layered panel with cavity. The sound insulation curve of the double-layer panel with cavity was obtained by simulation with the finite element software COMSOL. The accuracy of simulation results was verified by the experimental data of impedance tube test. On this basis, studying the sound insulation performance of the double-layer panel filled with porous materials. The porous materials was simulated by the equivalent fluid model. The influence of incident Angle, flow resistance and distribution of porous materials on the sound insulation performance of sandwich panel was studied The results show that the sound insulation performance of the sandwich panel filled with porous material is improved obviously in the middle and high frequency bands, and increasing the flow resistance of the porous material can improve the sound insulation performance of the sandwich panel.