共固化多层阻尼夹嵌复合材料梁的自由振动分析  

Free vibration of co-cured multi-layer damping films embedded composite beam

作　　者：孙兴帅 梁森 杨功先 SUN Xingshuai;LIANG Sen;YANG Gongxian(School of Mechanical and Automotive Engineering,Qingdao University of Technology,266520 Qingdao,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,青岛266520

出　　处：《应用力学学报》2024年第2期297-308,共12页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金资助项目(No.52075280);山东省自然科学基金资助项目(No.ZR2019MEE088)。

摘　　要：为获得大阻尼复合材料结构,开展了共固化多层阻尼膜夹嵌复合材料梁的动力学性能研究。基于一阶剪切变形理论和Hamilton原理,提出并推导了该结构的动力学方程,运用变分原理和伽辽金法求解了,在固支边界条件下的自由振动特性理论解,通过仿真和试验对理论可行性进行了验证,揭示了参数变化对一阶固有频率和阻尼比的影响,为多层阻尼膜在复合材料结构中的优化设计提供了理论依据。In order to obtain large damping composite material structure,the dynamic properties of the co-cured multi-layer damping films embedded composite beam are studied.Based on the first-order shear deformation theory and Hamilton's principle,a dynamic equation of the structure is presented,the theoretical solution of free vibration characteristics under the fixed-support boundary condition are derived and solved by using the variational principle and Galerkin method,by simulation and test to verify the feasibility of the theory,and the relationships of parameter change on the fundamental frequency and damping ratio are revealed.Conclusions provide a theoretical basis for the optimal design of multi-layer damping membranes in composite structures.

关 键 词：多层阻尼膜夹嵌复合材料梁 固支边界 固有振动 伽辽金法 模态试验 

分 类 号：TB332[一般工业技术—材料科学与工程]