Improving the correlation of finite element models using vibration correlation technique on composite cylindrical shells

摘要

The Vibration Correlation Technique (VCT) is a nondestructivernexperimental method that can be used for the estimation of realisticrnboundary conditions and to improve the correlation of numerical modelsrnused to estimate the buckling load of shell structures. This paper presentsrninitial experimental results of vibration frequencies and modes shapes of arncylindrical shell loaded in compression, up to buckling. The experimentalrnresults are used to point out the influence of the boundary conditions andrnmaterial properties on the correlation with a finite element model. Thernresults show that the application of calibrated boundary conditions andrnmaterial properties are not enough to guarantee a good numerical -rnexperimental correlation, requiring further studies suggested herein.