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
Key words
multi-layer damping films embedded composite beam/fixed-support boundary/natural vibration/Galerkin method/modal test
维普
万方数据