Abstract

The influence of two-to-one internal or autoparametric resonances on the nonlinear response of metallic and composite structures subjected to a harmonic excitation has been investigated theoretically and experimentally. The experimental observations are in good agreement with the theoretical predictions. When the excitation frequency is near the natural frequency of the second flexural mode, the autoparametric resonance gives rise to the saturation phenomenon and two-period quasi-periodic and chaotically modulated motions.

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