Uncertainties in structural dynamics for composite sandwich panels

C. Chen (1) , Denis Duhamel (2) , Christian Soize (1)

1 LaM - Laboratoire de Mécanique
2 LAMI - Laboratoire d'Analyse des Matériaux et Identification

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.

Mots clés: uncertainty quantification; structural dynamics; composite sandwich panels; nonparametric probabilistic method; model uncertainties; modeleing errors; random vibrations

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]; Probabilités [math.PR]; Statistiques [math.ST]; Théorie [stat.TH]; Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]

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⟩