Vibration analysis model of fiber-metal laminated plates with microporous viscoelastic  layer

JIANG Shijie1,2, WANG Ziheng1,2, YU Changshuai1,2,3, REN Xuhui1,2 WANG Xintong1,2, WANG Xiangping4, HAN Qingkai1,2, LI Hui1,2,4

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 59-65.

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 59-65.

Vibration analysis model of fiber-metal laminated plates with microporous viscoelastic  layer

  • JIANG Shijie1,2, WANG Ziheng1,2, YU Changshuai1,2,3, REN Xuhui1,2 WANG Xintong1,2, WANG Xiangping4, HAN Qingkai1,2, LI Hui1,2,4
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Abstract

In this paper, a vibration analysis model of fiber-metal laminated plates (FMLPs) with microporous-viscoelastic layers was established. The expressions of elastic moduli of the microporous-viscoelastic material with two-dimensional regular micropore distribution was derived based on the relationship between elastic moduli and density of porous materials. The displacement fields of the metal layers and fiber layers were expressed by using the classic laminate theory, and the Reddy’s higher-order shear deformation theory was adopted to describe the displacement field of the microporous-viscoelastic layers for consideration of its shear deformation. Furthermore, on the basis of the Rayleigh-Ritz method, the complex modulus method, the strain energy method and the mode superposition approach, the natural frequencies, damping characteristics and vibration responses in time and frequency domains of the structural system subjected to impulse excitation were solved. Finally, a self-prepared FMLP specimen with a microporous-viscoelastic layer, whose micropore diameter and spacing are 0.5mm and 2mm, was used as the research object to conduct an experimental validation. The comparison between the theoretical and experimental results shows that the maximum calculation errors of the first three natural frequencies, damping ratios and response peaks are less than 4.5%, 9.7% and 7.5%, respectively, which verifies the correctness of the proposed model. In addition, based on the established model, the influence of geometry parameters associated with the micropores on the structural vibration characteristics were also discussed.

Key words

microporous-viscoelastic layers / fiber-metal laminated plates / two-dimensional regular distributed micropores / vibration response / damping characteristics

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JIANG Shijie1,2, WANG Ziheng1,2, YU Changshuai1,2,3, REN Xuhui1,2 WANG Xintong1,2, WANG Xiangping4, HAN Qingkai1,2, LI Hui1,2,4. Vibration analysis model of fiber-metal laminated plates with microporous viscoelastic  layer[J]. Journal of Vibration and Shock, 2022, 41(9): 59-65

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