INHOMOGENEOUS ANNULAR PLATES WITH EXACTLY BEAM-LIKE RADIAL SPECTRA

There are seven classes of inhomogeneous beams which are isospectral w ith each other and with the homogeneous beam in the clamped-clamped co nfiguration. By a logarithmic coordinate transformation, eight classes of inhomogeneous clamped annular plates may thereby be obtained which have different radial distributions for densities and flexural rigidi ties but which all have the same radial vibration spectrum characteris tic of a clamped homogeneous beam.