M型皱褶芯材夹层板隔声性能研究  

Research on sound insulation performance of the M-type folded core sandwich panel

作　　者：叶语睿 王志瑾[1] YE Yurui;WANG Zhijin(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空学院,南京210016

出　　处：《航空工程进展》2024年第5期135-147,154,共14页Advances in Aeronautical Science and Engineering

摘　　要：作为先进复合材料夹层结构,皱褶芯材构型多样,先前研究大多围绕V型皱褶芯材展开,鲜有对其他构型的隔声性能研究。建立垂直入射声压激励下的四边简支M型皱褶芯材夹层板数值模型,基于有限元软件对其隔声性能进行数值仿真,并将理论预测的蜂窝夹层板隔声曲线与仿真结果进行对比;基于仿真模型,研究M型皱褶芯材夹层板结构的隔声性能,讨论皱褶芯材胞元几何参数对隔声性能的定性影响规律;研究双层芯材的M型皱褶芯材夹层板上下两层芯材的相对铺设错位、铺设角度对隔声性能的影响。结果表明:上下两层芯材在胞元Z形线步长方向错位叠放时隔声效果提高,且优于同面密度的单层皱褶芯材夹层板;在上下两层芯材相对铺设角度变化时,上下层芯材轴线垂直铺设时计权隔声量最大。As an advanced composite sandwich structure,the configuration of folded core is diverse,and previous research has mostly focused on the V-shaped folded core,while there is still relatively little research on the sound insulation performance of other configurations.A numerical model of a four sided simply supported M-shaped fold-ed core sandwich panel under vertical incident sound pressure excitation is established,and the numerical simulation of its sound insulation performance based on finite element software is conducted.The theoretical predicted sound transmission loss curve of the honeycomb sandwich panel is compared with the simulation results.Based on simula-tion models,the sound insulation performance of M-type folded core sandwich panel structure is systematically studied,and the qualitative influence of geometric parameters of folded core cell on sound insulation performance is discussed.The influence of relative misalignment and laying angle of the upper and lower layers of M-type folded core sandwich panel with double-layer core on sound insulation performance is proposed and studied.The results show that the sound insulation performance is improved when the upper and lower layers of core are staggered and stacked in the Z-shaped line step direction of the cell,and it is better than single-layer folded core sandwich panel with the same surface density.When the relative laying angle of the upper and lower layers of core changes,the maximum weighted sound insulation reached the most value while the axis of the upper and lower layers of core is vertically laid.

关 键 词：夹层板 M型皱褶芯材 胞元参数 隔声性能 双层芯材 铺设方式 

分 类 号：V214.8[航空宇航科学与技术—航空宇航推进理论与工程]