| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 730251 | Measurement | 2014 | 8 Pages |
•Authors used digital image correlation system for experimental modal analysis (EMA).•For the modal parameters estimation an original program called Modan 3D was created.•Modan 3D directly allows visualization of particular modes and damping ratios.•Its function was verified on two specimens by conventional experimental technique.•The proposed methodology markedly reduces time for EMA performing.
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.
