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An Enhanced Modal Approach for Large Deformation Modeling of Wing-Like Structures

Ritter, Markus and Cesnik, Carlos E. S. and Krüger, Wolf Reiner (2015) An Enhanced Modal Approach for Large Deformation Modeling of Wing-Like Structures. In: 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. AIAA. 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 5.-8. Januar 2015, Kissimmee, Flrida. DOI: 10.2514/6.2015-0176

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Abstract

A new modal-based method that captures the geometric nonlinear effects that arise in the regime of large deformations of wing-like structures is presented. The most limiting factors of the modal approach are the linear force-displacement relationship and the representation of the nodal displacement field based on normal modes. The proposed extension includes stiffness terms that cubically depend on the generalized coordinates. The structural deformation is calculated not only by normal modes but also by higher order mode components that account for the foreshortening effect at beam-type structures. The approach is applied to a cantilever slender wing. Static and dynamic results are presented together with results from a commercial finite element solver and from the UM/NAST aeroelastic solver from the University of Michigan. The numerical study highlights the capability of the new approach to capture nonlinear effects while keeping the simplicity of the modal approach.

Item URL in elib:https://elib.dlr.de/102737/
Document Type:Conference or Workshop Item (Speech)
Title:An Enhanced Modal Approach for Large Deformation Modeling of Wing-Like Structures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ritter, Markusmarkus.ritter (at) dlr.deUNSPECIFIED
Cesnik, Carlos E. S.cesnik (at) umich.eduUNSPECIFIED
Krüger, Wolf Reinerwolf.krueger (at) dlr.deUNSPECIFIED
Date:5 January 2015
Journal or Publication Title:56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2015-0176
Publisher:AIAA
Status:Published
Keywords:Large Deformation, Nonlinear Deformation, Fluid-Structure-Interaction, Nonlinear Aeroelasticity
Event Title:56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Event Location:Kissimmee, Flrida
Event Type:international Conference
Event Dates:5.-8. Januar 2015
Organizer:AIAA SciTech
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Ritter, Markus Raimund
Deposited On:12 Feb 2016 11:50
Last Modified:10 May 2016 23:44

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