<abstract xmlns="http://www.w3.org/1999/xhtml"><p> In this contribution an influence of random contrast patterns creation on the quality of the obtained results of experimental modal analysis performed by high-speed digital image correlation is described. Three common forms of random pattern creation were investigated. While the first form was presented by the black speckles printed on white matt vinyl foil and bonded on the sample surface, in the second and the third case, respectively, the black speckles were sprayed on white sprayed sample surface or on paint white one. For the purposes of modal parameters estimation in the form of natural frequencies, mode shapes and damping ratios the program called Modan3D, developed in the authors department, was used. The results obtained by Modan3D were compared with the results achieved by system Pulse specialized for vibration analysis.</p></abstract>

In this contribution an influence of random contrast patterns creation on the quality of the obtained results of experimental modal analysis performed by high-speed digital image correlation is described. Three common forms of random pattern creation were investigated. While the first form was presented by the black speckles printed on white matt vinyl foil and bonded on the sample surface, in the second and the third case, respectively, the black speckles were sprayed on white sprayed sample surface or on paint white one. For the purposes of modal parameters estimation in the form of natural frequencies, mode shapes and damping ratios the program called Modan3D, developed in the authors department, was used. The results obtained by Modan3D were compared with the results achieved by system Pulse specialized for vibration analysis.

Influence of Different Random Pattern Creation Forms on the Results of Experimental Modal Analysis Performed by High-Speed Digital Image Correlation

Faculty of Mechanical Engineering, Department of Applied Mechanics and Mechatronics, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia

Acta Mechanica et Automatica

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

In this contribution an influence of random contrast patterns creation on the quality of the obtained results of experimental modal analysis performed by...

Influence of Different Random Pattern Creation Forms on the Results of Experimental Modal Analysis Performed by High-Speed Digital Image Correlation

Published Online: Jul 02, 2014

Page range: 22 - 26

DOI: https://doi.org/10.2478/ama-2014-0004

Keywords
Digital Image Correlation, Experimental Modal Analysis, Random Pattern, Modan3D

© Bialystok University of Technology

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Influence of Different Random Pattern Creation Forms on the Results of Experimental Modal Analysis Performed by High-Speed Digital Image Correlation

Published Online: Jul 02, 2014

Page range: 22 - 26

DOI: https://doi.org/10.2478/ama-2014-0004

KeywordsDigital Image Correlation, Experimental Modal Analysis, Random Pattern, Modan3D

© Bialystok University of Technology

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keywords
Digital Image Correlation, Experimental Modal Analysis, Random Pattern, Modan3D