STUDY OF FUNDAMENTAL LAMB MODES BEHAVIOUR WITH A SHARP CHANGE OF SECTION IN A PLATE

摘要

In order to improve transport safety in aircrafts by a fast and efficient way, a possible solution is to embed a system of piezoelectric transducers that generates ultrasonic Lamb waves in the structure. Indeed, the interaction of Lamb waves with damage enables its detection. However, due to the properties of Lamb waves, the understanding of these interaction phenomena is complex. Therefore, the problem of Lamb modes interaction with a sharp change of section in a plate is analysed in this paper with the help of a new hybrid method based on the finite element method and the normal mode analysis.