Reference : Nonlinear Dynamic Analysis of Aerospace Structures

	Document type :	Scientific congresses and symposiums : Unpublished conference
	Discipline(s) :	Engineering, computing & technology : Aerospace & aeronautics engineering
	To cite this reference:	http://hdl.handle.net/2268/132016

Title :	Nonlinear Dynamic Analysis of Aerospace Structures
Language :	English
Author, co-author :	Kerschen, Gaëtan [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
	Noël, Jean-Philippe [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
	Renson, Ludovic [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
	Golinval, Jean-Claude [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Publication date :	Oct-2012
On invitation :	No
Audience :	International
Event name :	LMS European Aerospace Conference 2012
Event date :	du 4 octobre au 5 octobre 2012
Event organizer :	LMS International
Event place (city) :	Toulouse
Event country :	France
Keywords :	[en] Nonlinear dynamics ; Aerospace structures ; System identification ; Modal analysis
Abstract :	[en] Current practice in industry is to rely on linear finite element simulations. However, nonlinearity is a frequent occurrence in engineering structures. It is at the origin of rich and complex dynamical phenomena that cannot be observed in linear structures. Solving both the direct and inverse problems in nonlinear structural dynamics therefore warrants the development of appropriate methodologies. The focus of the presentation will first be on the inverse problem. We will describe the different steps of the nonlinear system identification process and discuss the current capabilities of existing methods. The presentation will then address the direct problem during which the identified model is used for accurately predicting the structure’s dynamic characteristics. A rigorous nonlinear extension of modal analysis will be presented, and we will show that it represents a very useful framework for understanding nonlinear dynamical phenomena and supporting design decisions. Two real-life aerospace structures will be considered for illustrating the proposed developments.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/132016

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