A Simple Model of a Stiffened Shell-Type Structure for an Investigation Into the Vibration-Buckling Correlation

[+] Author and Article Information
V. M. Ryaboy, T. Weller

Technion—lsrael Institute of Technology, Haifa 32000, Israel

J. Appl. Mech 63(2), 517-522 (Jun 01, 1996) (6 pages) doi:10.1115/1.2788898 History: Received April 28, 1994; Revised December 21, 1994; Online October 26, 2007


A nonlinear two-degree-of-freedom system is considered to simulate the peculiar behavior of stringer-stiffened cylindrical shells under nonuniform axial compression, which was observed in recent tests where the characteristic curves (eigenfrequency squared versus load) were nonmonotonic and decreasing steeply when approaching the critical load. Correlation is traced between the characteristic curves and equilibrium paths. It is shown that for particular nonzero values of load eccentricity, bifurcations are observed instead of the usual limit points. Nonunique stable post-buckling equilibrium paths are pointed out. The general properties of characteristic curves are discussed.

Copyright © 1996 by The American Society of Mechanical Engineers
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