A nonlinear system identification procedure based on a Higher-Order-Spectral (HOS) approach is developed. The fundamental element of the presented technique resorts to the HOS capabilities of detecting the changes induced in the system nonlinear dynamic behavior by the presence of a localized structural modification. Numerical tools for the estimation of the Higher-Order Spectra extracted from the time histories of a fully nonlinear physics-based plate model are implemented. An extensive experimental testing campaign is conducted on carbon/epoxy thin composite plates, in order to validate the presented identification procedure.
Nonlinear System Identification of Composite Plates with Higher-Order Spectra: Numerical Analyses and Experimental Tests / Pasquali, Michele; Lacarbonara, Walter; Marzocca, Pier. - (2011). (Intervento presentato al convegno 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 19th 4 - 7 April 2011, Denver, Colorado tenutosi a Denver, Colorado, USA) [10.2514/6.2011-2068].
Nonlinear System Identification of Composite Plates with Higher-Order Spectra: Numerical Analyses and Experimental Tests
Pasquali, Michele;Lacarbonara, Walter;Marzocca, Pier
2011
Abstract
A nonlinear system identification procedure based on a Higher-Order-Spectral (HOS) approach is developed. The fundamental element of the presented technique resorts to the HOS capabilities of detecting the changes induced in the system nonlinear dynamic behavior by the presence of a localized structural modification. Numerical tools for the estimation of the Higher-Order Spectra extracted from the time histories of a fully nonlinear physics-based plate model are implemented. An extensive experimental testing campaign is conducted on carbon/epoxy thin composite plates, in order to validate the presented identification procedure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
