The behavior of thin-will monocoque cylinders under torsional vibration

Pekelsma, Robert E (Department of Aeronautical Engineering, University of Michigan)
August 1937

Curves of forced frequency against amplitude are presented for the conditions where the forced frequency is both increased and decreased into the resonant range. On the basis of these curves it is shown that the practical resonance frequency is the point where wrinkling first occurs and that the resonance frequency will be subject to considerable travel once permanent wrinkles appear in the vibrating shell. The decreasing mode of striking resonance is found to be by far the most destructive condition.

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