Abstract
Buckling mode localization in rib-stiffened rectangular plates with randomly misplaced stiffeners is studied in this paper. Localization factors, which characterize the average exponential rates of growth or decay of amplitudes of deflection, are determined using the method of transfer matrix. The smallest positive Lyapunov exponent of the corresponding discrete dynamical system is the localization factor of interest. For a plate simply supported at the rib-stiffeners, the buckling behaviour of the plate is similar to that of a multispan continuous beam. The effect of misplacement of the rib-stiffeners on buckling mode localization increases with the increase of the flexural rigidities of the stiffeners. The larger the values of the torsional rigidities of the rib-stiffeners, the larger the values of the localization factors and the degrees of localization in the buckling modes.
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