Nonlinear modal properties of vibrating systems with nonsmooth (piecewise linear) characteristics typical of a beam with a breathing crack are investigated. The system is non linearizable and exhibits the peculiar feature of a number of nonlinear normal modes (NNMs) greater than the degrees of freedom. A parametric analysis of the NNMs has been performed for a wide range of the damage parameter: the influence of damage on the nonlinear frequencies has been investigated and bifurcations characterized by the onset of superabundant modes with or without internal resonance, have been revealed.
Nonlinear modal properties of discrete systems with piecewise restoring force / Casini, Paolo; Vestroni, Fabrizio. - (2008).
Nonlinear modal properties of discrete systems with piecewise restoring force
CASINI, Paolo;VESTRONI, Fabrizio
2008
Abstract
Nonlinear modal properties of vibrating systems with nonsmooth (piecewise linear) characteristics typical of a beam with a breathing crack are investigated. The system is non linearizable and exhibits the peculiar feature of a number of nonlinear normal modes (NNMs) greater than the degrees of freedom. A parametric analysis of the NNMs has been performed for a wide range of the damage parameter: the influence of damage on the nonlinear frequencies has been investigated and bifurcations characterized by the onset of superabundant modes with or without internal resonance, have been revealed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.