In the area of modal test/analysis/correlation, significant effort has been expended over the past twenty years in order to make reduced models and to expand test data for correlation and eventual updating of the finite element models. This has been restricted by vibration measurements which are traditionally limited to the location of relatively few applied sensors. Advances in computers and digital imaging technology have allowed 3D digital image correlation (DIC) methods to measure the shape and deformation of a vibrating structure. This technique allows for full-field measurement of excited structures, thus providing a wealth of simultaneous test data. This paper presents some preliminary results for the test/analysis/correlation of traditional modal data along with the DIC approach for comparison to a finite element model. Some of the advantages and limitations of the technique are presented and discussed.
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