Nonlinear modal analysis; Nonlinear normal modes; Modal interaction; Localization; Spacecraft
Abstract :
[en] Non-linear elements are present in practically all spacecraft structures. When such non-linear effects are important linear modal analysis can no longer be applied. The development of a non-linear analogue of linear modal analysis is therefore an important endeavor. The objective of this paper is to show that nonlinear normal modes (NNMs) represent a useful and practical tool in this context. A full-scale spacecraft structure is considered and is modeled using the finite element method. Its NNMs are computed using advanced numerical algorithms, and the resulting dynamics is then carefully analyzed. Nonlinear phenomena with no linear counterpart including nonlinear modal interactions are also highlighted.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Renson, Ludovic ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Noël, Jean-Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Kerschen, Gaëtan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Newerla, Alfred; European Space Agency (ESTEC) > Structures Section
Language :
English
Title :
Nonlinear Modal Analysis of the SmallSat Spacecraft
Publication date :
March 2012
Event name :
European Conference on Spacecraft Structures, Materials & Environmental Testing
Event organizer :
European Space Agency
Event date :
20-23 mars 2012
Audience :
International
Main work title :
Proceedings of the European Conference on Spacecraft Structures, Materials & Environmental Testing
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture
