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Experimental Study on the Feasibility of High-Speed 3-Dimensional Digital Image Correlation for Wide-Band Random Vibration Measurement

Beberniss, Timothy J.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544002299667838

Abstract Details

2018, PhD, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
A detailed summary of the extensive studies on the feasibility and practicality of utilizing high-speed 3-dimensional digital image correlation (3D-DIC) for various random vibration measurement applications is presented. Demonstrated capabilities include finite element model validation and updating utilizing full-field 3D-DIC static displacements, modal survey natural frequencies, damping, and mode shape results from 3D-DIC are baselined against laser Doppler vibrometry (LDV), a comparison between foil strain gauge and 3D-DIC strain, and finally the unique application to a high-speed wind tunnel fluid-structure interaction study. Results indicate good agreement between 3D-DIC and more traditional vibration measurement techniques. Unfortunately, 3D-DIC vibration measurement is not without its limitations, which were also identified and explored in this study. The out-of-plane sensitivity required for vibration measurement for 3D-DIC is orders of magnitude less than LDV making higher frequency displacements difficult to sense. Furthermore, the digital cameras used to capture the DIC images have no filter to eliminate temporal aliasing of the digitized signal. Ultimately it is felt DIC was demonstrated as a valid alternative means to measure structural vibrations while providing full-field noncontacting results not possible with other methods. Furthermore, one unique first of its kind application in a high-speed wind tunnel achieved success where more traditional methods would fail.
Randall Allemang, Ph.D. (Committee Chair)
Allyn Phillips, Ph.D. (Committee Member)
S. Michael Spottswood, Ph.D. (Committee Member)
David Thompson, Ph.D. (Committee Member)
Yongfeng Xu, Ph.D. (Committee Member)
183 p.
Mechanical Engineering
Digital Image Correlation; High-speed fluid-structure interaction; Random vibration; Nonlinear vibration; Temporal aliasing; Digital image refraction

Recommended Citations

Citations

  • Beberniss, T. J. (2018). Experimental Study on the Feasibility of High-Speed 3-Dimensional Digital Image Correlation for Wide-Band Random Vibration Measurement [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544002299667838

    APA Style (7th edition)

  • Beberniss, Timothy. Experimental Study on the Feasibility of High-Speed 3-Dimensional Digital Image Correlation for Wide-Band Random Vibration Measurement. 2018. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544002299667838.

    MLA Style (8th edition)

  • Beberniss, Timothy. "Experimental Study on the Feasibility of High-Speed 3-Dimensional Digital Image Correlation for Wide-Band Random Vibration Measurement." Doctoral dissertation, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544002299667838

    Chicago Manual of Style (17th edition)

ucin1544002299667838
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© 2018, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.