caa a22 4500 467913919 CHVBK 20180406152856.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s10999-006-9017-8 doi (NATIONALLICENCE)springer-10.1007/s10999-006-9017-8 High-order finite elements reduced models for modal analysis of stiffened panels [Elektronische Daten] [Paolo Lisandrin, Michel van Tooren] A method is presented to build reduced (equivalent) models of stiffened panels made of thin-walled composite materials. The technique is developed to be used in the modal analysis of panels and wing boxes, allowing finite element modelling and analysis using a single-type, three-dimensional orthotropic p-element. The use of a single element guarantees speed and flexibility in the (re)modelling of the structure and reduces the modelling and analysis errors connected to finite element analysis in preliminary-design/multidisciplinary-optimization environments. The method is tested on two types of representative wing boxes. Different approaches for the equivalencing are tested and compared to each other. The results show that the equivalent models give results within few percent from those obtained running a full model, saving as much as one order of magnitude in the number of degrees of freedom employed. Springer Science+Business Media, Inc., 2007 P-elements nationallicence Modal analysis nationallicence Equivalent/reduced models nationallicence Stiffened panels nationallicence Lisandrin Paolo Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands aut van Tooren Michel Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands aut International Journal of Mechanics and Materials in Design Kluwer Academic Publishers 3/2(2006-06-01), 111-127 1569-1713 3:2<111 2006 3 10999 https://doi.org/10.1007/s10999-006-9017-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10999-006-9017-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lisandrin Paolo Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands aut NATIONALLICENCE 700 1- van Tooren Michel Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands aut NATIONALLICENCE 773 0- International Journal of Mechanics and Materials in Design Kluwer Academic Publishers 3/2(2006-06-01), 111-127 1569-1713 3:2<111 2006 3 10999 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer