Vibration analysis of fixed-supported stiffened composite plate with embedded damping film

doi:10.19936/j.cnki.2096-8000.20221128.001

Abstract

Abstract: To study the free vibration characteristics of composite stiffened plate with embedded damping membrane, the theory of Timoshenko Beam reinforcement strain energy and kinetic energy is deduced. Utillzing the energy method to establish the free vibration theory model of stiffened plate, it will meet four edges clamped boundary conditions of structure displacement function by Galerkin method weighted residual value ideas into double series form. The vibration differential equation of the reinforced plate structure with embedded damping film was established and the free vibration frequency and loss factor of the structure were solved. The finite element model was constructed, specimens of stiffened plate made of damped film composite material were made and the experimental platform was built. The effectiveness of the theoretical model was proved by comparing the theoretical solution, numerical simulation solution and modal experiment. At the same time, the influence of the height of stiffeners and the distance between the stiffeners on the vibration characteristics of the stiffened plate is further studied,which provides a theoretical basis for the optimal design of stiffened plate of embedded damping film composite with large damping and high stiffness.

Key words: reinforced structure of embedded damping film composite material, fixed boundary, free vibration, galerkin method, the modal experiment

CLC Number:

TB332

JI Sheng-fei, LIANG Sen, WANG Guang-he. Vibration analysis of fixed-supported stiffened composite plate with embedded damping film[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(11): 5-14.

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