Journal
NONLINEAR DYNAMICS
Volume 69, Issue 1-2, Pages 285-294Publisher
SPRINGER
DOI: 10.1007/s11071-011-0264-3
Keywords
Plates; Finite degree-of-freedom system; Internal resonances; Nonlinear normal modes
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The vibrations of thin rectangular plate with geometrical nonlinearity are analyzed. The models of plate vibrations with different numbers of degrees-of-freedom are derived. It is deduced that two degrees-of-freedoms are enough to describe low-frequency nonlinear dynamics of plates. Nonlinear normal modes are used to analyze the system dynamics. If vibrations amplitudes are increased, single-mode plate vibrations are transformed into two mode ones. In this case, internal resonance conditions are not observed. Such transformation of vibration is described using Kauderer-Rosenberg nonlinear normal modes.
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