On elastic open waveguides and their numerical modelling with a modal approach
Résumé
The practical concern of this talk is the non-destructive evaluation (NDE) with guided waves of elongated structures (bar, cables, pipes...) partially or totally embedded into a solid matrix (cement, rock...). These structures are widely encountered in civil engineering. Numerical models are used to obtain the properties of the waves modes (velocity, leakage attenuation...), which are essential to interpret the NDE results. This talk presents three numerical models recently developed to compute the dispersion curves, the forced response and the diffracted field in such structures.
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