Experimental modal analysis performed by high-speed digital image correlation system

  • Trebuňa F
  • Hagara M
  • Trebu\vna F
 et al. 
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Abstract

In this paper a modification of a high-speed correlation system for the purposes of mechanical structures modal parameters estimation is described. Together with hardware modification an original version of a program Modan 3D was created, which is a complex tool for execution of an experimental and operational modal analysis. In the contribution the authors present just some information about a part of the program used for the experimental modal analysis. They describe algorithm required for a calculation of a normal mode indicator function (NMIF), a complex mode indicator function (CMIF), damping ratios as well and visualization of the mode shapes. A functionality of the program was tested during the analysis of two thin steel samples. A reliability of the reached results was verified by means of a system specialized for vibration analysis.

Author-supplied keywords

  • Digital image correlation
  • Experimental modal analysis
  • Modan 3D

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Authors

  • F. Trebuňa

  • M. Hagara

  • F Trebu\vna

  • M. Hagara

  • F. Trebuňa

  • M. Hagara

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