Most of the published literature for vibration mode shapes of plates is concerned with analytical and numerical results. There are only very few experimental results available for the full field configuration of mode shapes for vibrating plates. In this study, an optical system called the AF-ESPI method with the out-of-plane displacement measurement is employed to investigate experimentally the vibration behavior of square isotropic plates with different boundary conditions. The edges of the plates may either be clamped or free. As compared with the film recording and optical reconstruction procedures used for holographic interferometry, the interferometric fringes of AF-ESPI are produced instantly by a video recording system. Based on the fact that clear fringe patterns will appear only at resonant frequencies, both resonant frequencies and corresponding mode shapes can be obtained experimentally at the same time by the proposed AF-ESPI method. Excellent quality of the interferometric fringe patterns for the mode shapes is demonstrated.
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April 2001
Technical Briefs
Experimental Measurement of Mode Shapes and Frequencies for Vibration of Plates by Optical Interferometry Method
Chi-Hung Huang, Associate Professor,,
Chi-Hung Huang, Associate Professor,
Department of Mechanical Engineering, Ching Yun Institute of Technology, Chung-Li, Taiwan 320, Republic of China
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Chien-Ching Ma, Professor,
Chien-Ching Ma, Professor,
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China
Search for other works by this author on:
Chi-Hung Huang, Associate Professor,
Department of Mechanical Engineering, Ching Yun Institute of Technology, Chung-Li, Taiwan 320, Republic of China
Chien-Ching Ma, Professor,
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received Nov. 1999; revised Oct. 2000. Associate Editor: J. Q. Sun.
J. Vib. Acoust. Apr 2001, 123(2): 276-280 (5 pages)
Published Online: October 1, 2000
Article history
Received:
November 1, 1999
Revised:
October 1, 2000
Citation
Huang , C., and Ma , C. (October 1, 2000). "Experimental Measurement of Mode Shapes and Frequencies for Vibration of Plates by Optical Interferometry Method ." ASME. J. Vib. Acoust. April 2001; 123(2): 276–280. https://doi.org/10.1115/1.1352018
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