A photogrammetric method of determining the mode shapes of vibrating objects, and results for a thin wing

Report (1962)
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Published Date

30-11-1962

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Source:

National Research Council Aeronautical Report LR 362; NRC No. 7210

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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