The Effect of Nonlinearities on Flexible Structures
Final rept. Jan 1986-Sep 1989
VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIENCE AND MECHANICS
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The project is a theoretical and experimental investigation into the influence of nonlinearities on flexible structures in the presence of multifrequency parametric and external excitations having independent frequencies and phases and arbitrary amplitudes. The nonlinearities and excitations may appear in the governing equations, or the boundary conditions, or both. The study focused on resonance conditions that produce large and possibly damaging motions. Special attention was given to modal coupling and exchanges of energy. We classified the important resonances and their interactions and devised experiments illustrating the phenomena. Keywords Dynamic response Nonlinear effects Flexible structures Composites Modal coupling Resonances.