An investigation of the natural frequencies and mode shapes of double conical sandwich disks
National Aeronautics and Space Administration, 1963 - Science - 26 pages
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Aeronautics and Space aluminum honeycomb cores Bodies of Revolution center are presented CIES AND MODE cies calculated Clary compared with frequen CONICAL SANDWICH DISKS containing aluminum honeycomb core material cores and styrofoam D-1940 National Aeronautics data from vibration data show dif disk center pinned disks containing aluminum DOUBLE CONICAL SANDWICH F-6 model ferences in response fixed-center boundary condition homogeneous plate honeycomb-core models INVESTIGATION kinetic energy Langley Research Center lower modes maximum thickness measured mode shapes Measured natural frequen model H-3 modes are compared NASA TECHNICAL NOTE normal modes oscilloscope OTS price pattern f Poisson's ratio radially symmetric thickness Rayleigh energy method resonant frequencies response of disks Robert shallow sandwich disks SHAPES OF DOUBLE shear modulus shown in figure soft supports Space Administration styrofoam cores styrofoam-core models suspended on soft symmetric thickness linearly TECHNICAL NOTE D-1940 thickness linearly tapered Thompson TN D-1940 National unrestrained boundary condition vibration tests William