Journal of Aeronautics & Aerospace Engineering
Open Access

Vibration based methods for damage detection in structures

3^rd International Conference and Exhibition on Mechanical & Aerospace Engineering

October 05-07, 2015 San Francisco, USA

Emil Manoach

Bulgarian Academy of Sciences, Bulgaria

Posters-Accepted Abstracts: J Aeronaut Aerospace Eng

Abstract :

Vibration based damage detection methods are among the most popular and promising approaches for health monitoring of structures. In this work, a critical review of different methods for damage detection of structures is presented. The theoretical bases of the most popular methods based on the changes in the modal properties of the structures are deduced. The review includes the modal displacements, the mode shape slopes, the modal curvatures and the strain energy methods. Different variants of these methods are discussed. The efficiencies of all these methods are compared by using a finite element analysis of intact and damaged beams and plates. The methods are tested experimentally by using a scanning laser vibrometer to measure the modal properties of specially prepared composite structures with delaminations. All these methods are compared with the damage detection method based on the analysis of the Poincare maps of the motion of the structures. Conclusions about the advantages and applicability of the considered methods are deduced.

Biography :

Email: e.manoach@imbm.bas.bg