Structural damage localization from energy density measurements using an energetic approach

摘要

This paper presents a new damage detection strategy for structures, capable of identifying the defects from a set of energy density measurements, at medium and high frequencies. An inverse energetic approach, also called the inverse simplified energy method (IMES), is used for this purpose. It was first developed for the localization and the quantification of vibro-acoustic sources. The main novelty of this paper is to extend this inverse approach to the field of defects detection, to localize the flaw through the knowledge of the energy density field within the structure. A new numerical methodology is proposed in this paper for this purpose. Numerical simulations with different defect cases were performed to validate the presented method. Results show that IMES is an effective predictive tool in structural damage detection.