Characterization of nonlinear coupled dynamics in sandwich structures

Georgiou, IT

dc.contributor.author	Georgiou, IT	en
dc.date.accessioned	2014-03-01T02:51:57Z
dc.date.available	2014-03-01T02:51:57Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35775
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-69949138260&partnerID=40&md5=47a1e2fd8bd6daa7ae6510a5e8dac925	en
dc.subject.other	Blast loads	en
dc.subject.other	Coupled dynamics	en
dc.subject.other	Equivalent continuum	en
dc.subject.other	Finite element models	en
dc.subject.other	Geometric non-linearity	en
dc.subject.other	Harmonic force	en
dc.subject.other	Hexagonal honeycomb cores	en
dc.subject.other	High fidelity	en
dc.subject.other	Non-linear finite element model	en
dc.subject.other	Nonlinear normal modes	en
dc.subject.other	Proper orthogonal decompositions	en
dc.subject.other	Reduced order models	en
dc.subject.other	Space and time	en
dc.subject.other	Time discrete	en
dc.subject.other	Vibration properties	en
dc.subject.other	Continuum mechanics	en
dc.subject.other	Coupled circuits	en
dc.subject.other	Finite element method	en
dc.subject.other	Honeycomb structures	en
dc.subject.other	Mechanical engineering	en
dc.subject.other	Sandwich structures	en
dc.subject.other	Dynamics	en
dc.title	Characterization of nonlinear coupled dynamics in sandwich structures	en
heal.type	conferenceItem	en
heal.publicationDate	2009	en
heal.abstract	In this work, the nonlinear coupled dynamics of a sandwich structure with hexagonal honeycomb core are characterized in terms of Proper Orthogonal Decomposition modes. A high fidelity nonlinear finite element model is derived to describe geometric nonlinearity and displacement and rotation fields that govern the coupled dynamics. Contrary to equivalent continuum models used to predict vibration properties of lattice and sandwich structures, a high fidelity finite element model allows for a quite detailed description of the distributed complicated geometric nonlinearity of the core. It was found that the free dynamics excited by a blast load and the forced dynamics excited by a harmonic force posses POD modes which are localized in space and time. The processing of the simulated dynamics by the Time Discrete Proper Transform forms a means to study the nonlinear coupled dynamics of sandwich structures in the context of nonlinear normal modes of vibration and reduced order models. Copyright © 2008 by ASME.	en
heal.journalName	ASME International Mechanical Engineering Congress and Exposition, Proceedings	en
dc.identifier.volume	11	en
dc.identifier.spage	707	en
dc.identifier.epage	717	en