Effects of negative Poisson’s ratio grating on vibration characteristics of sandwich panel

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (3) : 18-25.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Effects of negative Poisson’s ratio grating on vibration characteristics of sandwich panel

SHAO Yuechuan1,2, WANG Xianzhong*1,2, MA Weijia3, QI Wenchao1,2, YE Xi4, ZHAN Bixin1,2

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Abstract

Here, taking a negative Poisson’s ratio composite sandwich panel as the study object, its vibration characteristics were studied.Firstly, a sandwich panel model was designed and prepared, and forced vibration tests in air were conducted for it.Then, a numerical model was established based on finite element method for simulation calculations.The rationality and reliability of the numerical model built here were verified by comparing test results and simulation ones.Finally, effects of form, angle and thickness of grating cross-section as well as grating material in core layer on vibration characteristics of whole sandwich panel were explored.The study showed that when the equivalent density of core layer is the same, concave hexagonal grating is more conducive to structural vibration reduction design; structural vibration responses decrease with decrease in cross-sectional angle; changes of cross-sectional thickness have different effects on vibration response curves in different frequency bands, but these changes have less impact on response peak value; sandwich panels taking carbon/glass hybrid fiber as grating material have the smallest vibration response.

Key words

negative Poisson’s ratio / composite sandwich panel / vibration characteristics / vibration reduction design

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SHAO Yuechuan1, 2, WANG Xianzhong1, 2, MA Weijia3, QI Wenchao1, 2, YE Xi4, ZHAN Bixin1, 2. Effects of negative Poisson’s ratio grating on vibration characteristics of sandwich panel[J]. Journal of Vibration and Shock, 2025, 44(3): 18-25

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