scholarly journals Operational Modal Analysis of a Rotating Cantilever Beam Using High-Speed Digital Image Correlation

2016 ◽  
Author(s):  
Sergio S. Rizo-Patron ◽  
Jayant Sirohi
Keyword(s):  
Digital Image Correlation ◽  
Modal Analysis ◽  
Cantilever Beam ◽  
Digital Image ◽  
High Speed ◽  
Operational Modal Analysis ◽  
Image Correlation

Full-field modal analysis during base motion excitation using high-speed 3D digital image correlation

2017 ◽  
Vol 28 (10) ◽  
pp. 105402 ◽  
Author(s):  
Ángel J Molina-Viedma ◽  
Elías López-Alba ◽  
Luis Felipe-Sesé ◽  
Francisco A Díaz
Keyword(s):  
Digital Image Correlation ◽  
Modal Analysis ◽  
Digital Image ◽  
High Speed ◽  
Image Correlation ◽  
Full Field ◽  
3D Digital Image Correlation

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

2014 ◽  
Vol 8 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Martin Hagara ◽  
Martin Schrötter ◽  
Pavol Lengvarský
Keyword(s):  
Digital Image Correlation ◽  
Modal Analysis ◽  
Digital Image ◽  
High Speed ◽  
Sample Surface ◽  
Experimental Modal Analysis ◽  
Parameters Estimation ◽  
Image Correlation ◽  
Mode Shapes ◽  
Random Pattern

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.

scholarly journals Full-Field Operational Modal Analysis of an Aircraft Composite Panel from the Dynamic Response in Multi-Impact Test

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1602
Author(s):  
Ángel Molina-Viedma ◽  
Elías López-Alba ◽  
Luis Felipe-Sesé ◽  
Francisco Díaz
Keyword(s):  
Modal Analysis ◽  
Energy Absorption ◽  
High Speed ◽  
Operational Modal Analysis ◽  
Modal Identification ◽  
Image Correlation ◽  
Composite Panel ◽  
Impact Excitation ◽  
Full Field ◽  
The Impact

Experimental characterization and validation of skin components in aircraft entails multiple evaluations (structural, aerodynamic, acoustic, etc.) and expensive campaigns. They require different rigs and equipment to perform the necessary tests. Two of the main dynamic characterizations include the energy absorption under impact forcing and the identification of modal parameters through the vibration response under any broadband excitation, which also includes impacts. This work exploits the response of a stiffened aircraft composite panel submitted to a multi-impact excitation, which is intended for impact and energy absorption analysis. Based on the high stiffness of composite materials, the study worked under the assumption that the global response to the multi-impact excitation is linear with small strains, neglecting the nonlinear behavior produced by local damage generation. Then, modal identification could be performed. The vibration after the impact was measured by high-speed 3D digital image correlation and employed for full-field operational modal analysis. Multiple modes were characterized in a wide spectrum, exploiting the advantages of the full-field noninvasive techniques. These results described a consistent modal behavior of the panel along with good indicators of mode separation given by the auto modal assurance criterion (Auto-MAC). Hence, it illustrates the possibility of performing these dynamic characterizations in a single test, offering additional information while reducing time and investment during the validation of these structures.

High-speed digital-image correlation method

2009 ◽  
Vol 34 (13) ◽  
pp. 1955 ◽  
Author(s):  
Min Wang ◽  
Hao Wang ◽  
Yuwan Cen
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
High Speed ◽  
Correlation Method ◽  
Image Correlation ◽  
Digital Image Correlation Method
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