Experimental Studies on Application of Digital Image Correlation in Modal Parameter Identification

Abstract:

The accurate identification of modal parameters is the core content in the experiment modal analysis of structure. The effective and accurate collection of vibration dates comes to be as the premise of high precise identification. This paper presents a new method of data collection in modal parameter identification. By high-speed camera, time series images of vibration were obtained; Then, the images collected were processed using digital image correlation method, and the time-displacement graphic on vibration direction of some pixels selected was got; Finally ,the time-domain signal was post-processed based on the complex Morlet wavelet transform, and the modal parameters were got. By a specific experiment, the method was proved feasible and effective.

• Periodical: Applied Mechanics and Materials (Volumes 105-107)
• Pages: 238-243
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.105-107.238
• Online since: September 2011
• Authors: E Liang Dong, Wei Hui Wang, Wei Zhang
• Keywords: Digital Image Correlation (DIC), High Speed Camera, Modal Parameter Identification, Wavelet Transform (WT)

References

[1] X.Q. L: Design, Application of Digital Image Processing in Experiment Mechanics (M.S., Tianjin University, China 2007), p.1.

[2] B. Pan, D.F. Wu and ZT Gao: Structure & Environment Engineering, Vol. 38 (2011) No.1, p.52. (In Chinese)

[3] B. Pan, and H.M. Xie: Optics Journal, Vol. 27 (2007) No.11, p.1980. (In Chinese)

[4] G.K. Nuo and L.M. Zhang: Journal of Vibration and Shock, Vol. 26 (2007) No.7, p.135. (In Chinese)

[5] B.F. Yan, A. Miyamoto and E. Brühwiler: Journal of Sound and Vibration, Vol. 291 (2006) No.1, p.285.

[6] J. Teng, Y.H. Zhu and F Zhou: Journal of Vibration and Shock, Vol. 28 (2009) No.8, p.25. (In Chinese)