Print Email Facebook Twitter A photogrammetric method of determining the mode shapes of vibrating objects, and results for a thin wing Title A photogrammetric method of determining the mode shapes of vibrating objects, and results for a thin wing Author Ohman, L.H. van Wijk, M.C. Institution National Research Council Canada, National Aeronautical Establishment Date 1962-11-30 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. To reference this document use: http://resolver.tudelft.nl/uuid:27397b1e-326f-48cb-8c17-124bb8ead1b8 Publisher National Research Council Canada Access restriction Campus only Source National Research Council Aeronautical Report LR 362; NRC No. 7210 Part of collection Aerospace Engineering Reports Document type report Rights (c) 1962 National Research Council Canada Files PDF LR-362.pdf 2.94 MB Close viewer /islandora/object/uuid:27397b1e-326f-48cb-8c17-124bb8ead1b8/datastream/OBJ/view