带有多孔泡沫芯的纤维/树脂三明治板声振特性  

Vibration and acoustics characteristics of fiber/resin sandwich sheet with porous foam core

作　　者：祖旭东[1,3] 任旭辉 邹泽煜 李晖 ZU Xudong;REN Xuhui;ZOU Zeyu;LI Hui(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;North Automatic Control Technology Institute,China North Industries Group Corporation Limited,Taiyuan 030006,China;School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]南京理工大学机械工程学院,南京210094 [2]中国兵器工业集团有限公司北方自动控制技术研究所,太原030006 [3]东北大学机械工程与自动化学院,沈阳110819

出　　处：《航空动力学报》2023年第9期2214-2220,共7页Journal of Aerospace Power

基　　金：国家自然科学基金(11872214,52175079)。

摘　　要：针对带有多孔泡沫芯的纤维/树脂三明治板,建立了其在平面声波载荷激励下的声振特性分析模型。基于1阶剪切变形理论、四节点等参四边形单元有限元法等,推导了平面声波载荷作用下结构的自由、强迫振动方程,成功求解了固有频率和振动速度响应。为了获取结构的声辐射功率,使用瑞利积分方法确定了振动速度响应和辐射声压之间的定量关系,并通过定义辐射与入射声功率,获得了结构的传声损失系数。利用自行搭建的振动和噪声一体化测试系统开展了实验验证研究,发现理论计算获得的固有频率、共振响应和声压响应的计算误差分别不超过4.9%、10.8%和8.9%,由此证明了所建立的理论模型在预测结构声振响应特性方面的有效性。A theoretical analysis model of vibration and acoustic characteristics for fiber-reinforced polymer sandwich sheet with a porous foam core subjecting to planar acoustic wave was established.First of all,based on the first-order shear deformation theory and the four-node quadrilateral isoperimetric finite element approach,the free and forced vibration equations of the sandwich sheet subjecting to planar acoustic wave were derived to solve natural frequencies,modal shape and vibration velocity response.Furthermore,to obtain the sound radiation power of the sandwich sheet,the Rayleigh integral approach was used to determine the quantitative relationships between the vibration velocity response and acoustic radiation pressures,and the sound transmission loss was obtained by defining the radiation and incident acoustic power.An experimental verification study was performed using a self-built integrated vibration and noise test system.It was found that the calculation errors of natural frequency,resonance response and sound pressure response obtained by theoretical analysis were less than 4.9%,10.8%and 8.9%,respectively,proving the effectiveness of the established model in predicting the structural vibration and acoustics responses.

关 键 词：声振特性 分析模型 多孔泡沫芯 三明治板 纤维/树脂 

分 类 号：V258.3[一般工业技术—材料科学与工程] TB532[航空宇航科学与技术—航空宇航制造工程]