1 January 1990 Variation in displacement values along projection moire fringes in contour difference and vibration analysis of structures
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Abstract
This paper presents a qualitative and quantitative analysis of timeaveraged projection moire vibration measurements for a plate and a cylindrical shell. It is pointed out that although moire fringes are generally considered to represent a constant contour difference or constant vibration level, in practice, variations in local grid pitch values on the test-item surface result in wide variations in measured displacement levels for given fringe numbers, which must be taken into consideration for quantitative evaluation.
Philip Hopstone, Philip Hopstone, Avi Katz, Avi Katz, Jacob Politch, Jacob Politch, } "Variation in displacement values along projection moire fringes in contour difference and vibration analysis of structures," Optical Engineering 29(1), (1 January 1990). https://doi.org/10.1117/12.55561 . Submission:
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