Experimental free-free vibration frequencies and nodal patterns of two 4-percent-thick monologue beams, which differed only in cover-sheet thickness, are presented and comparisons are made between experimental and calculated beam frequencies. For the beam with thicker cover sheets, calculated frequencies were within 12 percent of the experimental frequencies for the first six bending modes and the first two torsion modes. For the other beam, comparable accuracies were obtained for only the first three bending modes.
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