Numerical computation of wave characteristics in composite laminated structures is obtained using a Wave Finite Element (WFE) method. The technique involves developing a valid FE model of a small segment of the structure, typically using a commercial FE package, and post-processing the system matrices numerically using the theory of wave propagation in periodic structures. The method is briefly described. Viscoelasticity and pre-stress are taken into account, and some of their effects on complex dispersion curves, group velocity, energy velocity, and global loss factor are shown and briefly discussed. An energy balance formulation, obtained from the complex Poynting’s theorem, and an expression to evaluate the energy velocity for the general case of viscoelastic anisotropic panels are also provided and discussed. Numerical examples concerning a curved sandwich panel are presented.

Dynamic and acoustic properties of visco-elastic laminated structures using a Wave Finite Element method / Manconi, Elisabetta; B. R., Mace. - 1 di 5:(2010), pp. 95-103. (Intervento presentato al convegno ICSV17, 17th International Congress on Sound and Vibration tenutosi a Cairo nel 18-22 July, 2010).

Dynamic and acoustic properties of visco-elastic laminated structures using a Wave Finite Element method.

MANCONI, Elisabetta;
2010-01-01

Abstract

Numerical computation of wave characteristics in composite laminated structures is obtained using a Wave Finite Element (WFE) method. The technique involves developing a valid FE model of a small segment of the structure, typically using a commercial FE package, and post-processing the system matrices numerically using the theory of wave propagation in periodic structures. The method is briefly described. Viscoelasticity and pre-stress are taken into account, and some of their effects on complex dispersion curves, group velocity, energy velocity, and global loss factor are shown and briefly discussed. An energy balance formulation, obtained from the complex Poynting’s theorem, and an expression to evaluate the energy velocity for the general case of viscoelastic anisotropic panels are also provided and discussed. Numerical examples concerning a curved sandwich panel are presented.
2010
9781617822551
Dynamic and acoustic properties of visco-elastic laminated structures using a Wave Finite Element method / Manconi, Elisabetta; B. R., Mace. - 1 di 5:(2010), pp. 95-103. (Intervento presentato al convegno ICSV17, 17th International Congress on Sound and Vibration tenutosi a Cairo nel 18-22 July, 2010).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2327963
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