Using a Plate FRF set to Identify a Damaged Site Without Employing a Reference Dataset
Palavras-chave:
spatial statistics, Energy Correlation Distance, Structural Health Monitoring, kriging, Frequency-based Damage Detection MethodResumo
The procedure is based on the Energy Correlation Distance between each FRF (Frequency
Response Function) collected on a grid and the set composed by all FRFs from a measurement mesh. To
enhance the difference between a healthy and a damaged sites the FRF frequency sequence for highest
modes is employed. This Energy Correlation Distance, at each grid point, is then treated using classical
spacial statistical procedure, Krige method and Spatial Autocorrelation. To illustrate the procedure some
initial results are included. Results for experimental data from composite plates and from a aluminium
shell plate are presented. Remarks about the presented method improvements, limitations and restrictions
are also incorporated.
