A photogrammetric method of determining the mode shapes of vibrating objects, and results for a thin wing
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Abstract
A photogrammetric method of measuring the maximum displacements of a harmonically oscillating structure is described. A photographic exposure is taken of reference marks on the oscillating object and the photogrammetric measurements are made on the negative plate. The method has been applied to determine the normal mode shapes of a thin wing. The experimental arrangements for these tests are described and the results for the first two normal modes presented.
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