A subspace fitting method based on finite elements for fast identification of damages in vibrating mechanical systems

Guillaume Gautier (1) , Roger Serra (1) , Jean-Mathieu Mencik (1)

1 LMR - Laboratoire de Mécanique et de Rhéologie

In this paper, a method based on subspace fitting is proposed for identification of faults in mechanical systems. The method uses the modal information from an observability matrix, provided by a stochastic subspace identification. It is used for updating a Finite Element Model through the Variable Projection algorithm. Experimental example aims to demonstrate the ability and the efficiency of the method for diagnosis of structural faults in a mechanical system.

Mots clés: subspace fitting; finite element model updating; subspace identification

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]

Guillaume Gautier, Roger Serra, Jean-Mathieu Mencik. A subspace fitting method based on finite elements for fast identification of damages in vibrating mechanical systems. 25th International Conference on Noise and Vibration engineering, Sep 2012, Leuven, Belgium. pp.ID 239. ⟨hal-00819187⟩