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@article{Palacios:2019:10.2514/1.J057556,
author = {Palacios, Nieto R and Cea, A},
doi = {10.2514/1.J057556},
journal = {AIAA Journal},
pages = {4255--4268},
title = {Nonlinear modal condensation of large finite element models: An application of Hodges’ intrinsic theory},
url = {http://dx.doi.org/10.2514/1.J057556},
volume = {57},
year = {2019}
}

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TY  - JOUR
AB  - A method to obtain geometrically nonlinear reduced-order descriptions of structures defined by a large finite element model is presented. The full model is used to identify all the coefficients in a modal projection of Hodges’s intrinsic beam equations, with the geometric reduction introduced through static or dynamic condensation along the main load paths on the original structure. The only information retrieved from the full model is the linear normal modes as well as condensed mass and stiffness and nodal coordinates. The approach aims to solve geometrically nonlinear problems of industrial complexity in an efficient manner, while preserving the linear model under small displacements. Examples of increasing complexity will be shown with the built-up finite element models made with beams and shells and both lumped and distributed masses. Nonlinear static and dynamic analyses, including rigid-body dynamics, are then demonstrated using the resulting nonlinear modal description.
AU  - Palacios,Nieto R
AU  - Cea,A
DO  - 10.2514/1.J057556
EP  - 4268
PY  - 2019///
SN  - 0001-1452
SP  - 4255
TI  - Nonlinear modal condensation of large finite element models: An application of Hodges’ intrinsic theory
T2  - AIAA Journal
UR  - http://dx.doi.org/10.2514/1.J057556
UR  - http://hdl.handle.net/10044/1/65484
VL  - 57
ER  -

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Rafael Palacios

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