Wave decomposition method for identification of structural parameters

Michal Ruzek , Jean-Louis Guyader (1, 2) , Charles Pezerat (3)

1 LVA - Laboratoire Vibrations Acoustique
2 CeLyA - centre Lyonnais d'Acoustique
3 LAUM - Laboratoire d'Acoustique de l'Université du Mans

This paper presents a newly-developed inverse method based on decomposition of the vibration field into natural waves. It is adapted for 1D and 2D structures which are described by one equation of motion. The method permits to identify the parameters of the equation of motion. The important feature of this approach is that it does not necessitate any knowledge of the boundary conditions. It is a so-called local method. Several experimental test were performed. Two examples are presented: determination of the axial force in the straight beam and determination of flexural rigidity of the plate.

Mots clés: Inverse problem; Wave decomposition; Mid-frequency; Beam

Domaines: Acoustique [physics.class-ph]

Michal Ruzek, Jean-Louis Guyader, Charles Pezerat. Wave decomposition method for identification of structural parameters. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810848⟩