Análisis modal experimental en campo completo empleando correlación digital de imágenes en alta velocidad

Abstract

In this thesis HS DIC is explored to be used in experimental modal analyses. This technique provides higher spatial density and non-invasive measurements over traditional sensors. Firstly, a methodology for modal characterisation in base motion test is proposed. This methodology establish a converstion of the response to base excitation into its equivalent response to pointwise force excitation. The circle-fit method is employed since it is an efficient modal identification method for HS DIC measurements. The theroretical and numerical models validate the methodology results for a cantilever beam. Additionally, it is explored the measurements in magnified motion images. The methodology is validated in a cantiléver beam and applied to a complex composite panel. The results show notable improvements in the measurements both in 2D and 3D.