Optimizing camera position for the modal analysis of a 3D structure

Kadidja Mohamed Barkat (1) , Gwendal Cumunel (2) , Michel Bornet (2) , Marc Quiertant (1)

1 MAST-EMGCU - Expérimentation et modélisation pour le génie civil et urbain
2 NAVIER UMR 8205 - Laboratoire Navier

Full-field kinematic measurements with one or several high-speed cameras is a promising non-invasive technique for the modal analysis of civil engineering structures. It raises however the question of the positioning of the cameras for an optimal geometric characterization of the mode shapes of interest. We address this question on a simplified model, from both experimental and numerical points of view. Standard perpective projection equations are first used. A mode-visibility criterion is proposed and illustrated for two modes and positions. Possible enrichments of the criterion are discussed.

Mots clés: STRUCTURAL VIBRATION; MODAL ANALYSIS; DIGITAL IMAGE CORRELATION; PINHOLE PROJECTION

Mots clés: VIBRATION MECANIQUE; STRUCTURE; CONTROLE NON DESTRUCTIF; CAMERA; LOCALISATION; IMAGERIE 3D

Domaines: Traitement du signal et de l'image [eess.SP]

Kadidja Mohamed Barkat, Gwendal Cumunel, Michel Bornet, Marc Quiertant. Optimizing camera position for the modal analysis of a 3D structure. 7th PhotoMechanics iDICs conference, Nov 2021, Nantes, France. 2 p. ⟨hal-03714588⟩