Vibration characteristics analysis and numerical simulation for stiffened plates with damping core composite

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (5) : 250-261.

LU Qinghe , LIANG Sen, ZHOU Yunfa, ZHENG Changsheng

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Abstract

Based on the first-order shear deformation theory (FSDT), expressions of strain energy and kinetic energy of a stiffened plate with damping core composite and stiffeners were derived, and its governing dynamic differential equations were established using Hamilton principle.According to the relevant boundary conditions, the equations were solved using Fourier series.The finite element model for this damping core composite stiffened plate was established using the software ANSYS considering combination mode of damping material and fiber prepreg in this plate.Dynamic characteristics of the plate were studied with the finite element numerical simulation method of modal strain energy.Through comparing the numerical simulation results with the theoretical solutions, the rationality and effectiveness of the finite element model were verified.Effects of different rib sizes, number of ribs and distribution of ribs on dynamic characteristics of this plate were discussed to obtain variation laws of its first-order modal frequency and loss factor versus varying curves of different parameters.The study results provided a reference for optimization design of stiffened plates with damping core composite.

Key words

damping core composite / stiffened plate / dynamic characteristics / ANSYS finite element numerical simulation / loss factor

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LU Qinghe,LIANG Sen, ZHOU Yunfa, ZHENG Changsheng. Vibration characteristics analysis and numerical simulation for stiffened plates with damping core composite[J]. Journal of Vibration and Shock, 2020, 39(5): 250-261

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