Results and Experiences from the Application of Digital Image Correlation in Operational Modal Analysis

Abstract

Digital Image Correlation is a modern full-field optical method that is being used for measurement of 3D displacements and surface strains. The correlation systems using the high-speed digital cameras also allow perform dynamic measurements and vibration analysis. The paper deals with possibilities of using the high-speed correlation system Dantec Dynamics Q-450 for determination of modal parameters. Since, the correlation system does not have software tools for the evaluation of such type of measurement, the using of another post-processing application is necessary. The paper describes a conception and the basic functions of the software tool that is being developed for that purpose. The main attention of the paper is focused on Operational Modal Analysis.