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Uncertainties in structural dynamics for composite sandwich panels

Abstract : This paper concerns uncertainties in structural dynamics for composite sandwich panels constituted of two thin carbon-resin skins and one high stiffness closed-cell foam core. Each skin is constituted of two unidirectional plies [60/-60]. Such light composite sandwich panels, manufactured with a same process, generally present a significant dispersion for their Frequency Response Functions (FRF) in the Low-Frequency (LF) and Medium-Frequency (MF) ranges. The objectives of this paper are (1) to study the dispersion due to the process by using experiments (2) to develop a predictive mean mechanical model based on the use of the laminated composite thin plate theory in dynamics and (3) to use a nonparametric probabilistic approach for data and model uncertainties to improve the predictability of the mean model in the MF dynamics.
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Submitted on : Sunday, April 8, 2012 - 2:09:20 PM
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  • HAL Id : hal-00686190, version 1


C. Chen, Denis Duhamel, Christian Soize. Uncertainties in structural dynamics for composite sandwich panels. International Conference on Modal Analysis, Noise and Vibration Engineering, Sep 2004, Leuven, Belgium. pp.Pages: 2995-3008. ⟨hal-00686190⟩



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