A reduced formulation for the free-wave propagation analysis in composite structures

C. Droz; J. -P. Lain{é}; M. N. N Ichchou; G. Inqui{é}t{é}

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arXiv · 2610.26305

A reduced formulation for the free-wave propagation analysis in composite structures

C. Droz·J. -P. Lain{é}·M. N. N Ichchou·G. Inqui{é}t{é}

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Abstract

This paper presents an improved numerical strategy for the broadband analysis of wave propagation in composite or complex cross-sectional waveguides using the wave finite element method (WFE). Numerical analysis of such structures require highly discretized finite element models and leads to extensive computations. The proposed formulation relies on a projection of the cross-sectional transfer matrices on a reduced set of shape functions associated to propagating waves. Dispersion curves are then predicted only using a reduced number of eigenvectors. The performances and stability of this method are evaluated using the wavenumbers and wave shapes. Validations are provided for a sandwich composite beam and a cylindrical elasto-acoustic waveguide.

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C. Droz, J. -P. Lain{é}, M. N. N Ichchou, G. Inqui{é}t{é}. 2026-10-19. A reduced formulation for the free-wave propagation analysis in composite structures. https://arxiv.org/abs/2610.26305

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