This study presents an algorithm based on the proper orthogonal decomposition technique for health monitoring of composite structures. A finite element model of a carbon/epoxy composite plate is used to generate vibration data for healthy and damaged structures. Damage is simulated by varying levels of stiffness reduction for the finite elements in the damaged zone of the structure. Five different random excitation inputs are used for each of the three damage locations investigated. The results show that the algorithm gives a good indication of damage location and severity, except close to the fixed boundary. Further studies are planned to refine the damage detection algorithm and validate it experimentally.
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