Free vibration of porous fiber-reinforced sandwich composite panels with various ply angles

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (12) : 110-121.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Free vibration of porous fiber-reinforced sandwich composite panels with various ply angles

SUN Ruijun，YANG Fazhan*，ZHANG Jingjing

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Abstract

To analyze the dynamic performance of variable-angle ply porous fiber-reinforced sandwich composite panels under simply supported boundary conditions, the vibration differential equations for the porous double-layer sandwich panels were established based on the layerwise theory and the Rayleigh-Ritz method. These equations were subsequently solved using the Navier method. The dynamic characteristics at various ply angles were analyzed using Abaqus and the modal tests were performed with [0°/90°] and [±45°] ply orientations to validate the accuracy of the theoretical model. A parametric analysis of the porous double-layer sandwich panel was conducted using the theoretical model, followed by structural optimization using a genetic algorithm. The research reveals that laminated panels with a porosity of 94.854% and fiber ply angles in multiples of 45° exhibit outstanding dynamic performance. These results provide a reference for the design and manufacture of such structures.

Key words

porous fiber-reinforced membrane / free vibration / ply angle / modal test / finite element simulation / composite panel

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SUN Ruijun, YANG Fazhan, ZHANG Jingjing. Free vibration of porous fiber-reinforced sandwich composite panels with various ply angles[J]. Journal of Vibration and Shock, 2025, 44(12): 110-121

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