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Nonlinear numerical flight dynamics for the prediction of maneuver loads

Ritter, Markus and Dillinger, Johannes (2011) Nonlinear numerical flight dynamics for the prediction of maneuver loads. In: Proceedings "IFASD 2011". IFASD 2011 - 15th International Forum on Aeroelasticity and Structural Dynamics, 26 - 30 June 2011, Paris, Frankreich.



Dynamic analysis of flexible aircraft typically involves the separation of rigid body and structural dynamics. This approach is justified, if an adequate distance between the frequencies of the elastic and the flight mechanic modes is present. For aircraft structures characterized by relatively low elastic frequencies (e.g. large passenger aircraft or sailplanes) the combined calculation of the coupled rigid body and structural dynamics becomes important and the setup of an integrated aeroelastic model of the aircraft is necessary. This article describes the derivation of the integrated aeroelastic model, composed of governing equations for the translational, the rotational, and the elastic motion. A modal approach is used for the calculation of the elastic deformations of the aircraft, therefore using unconstrained free-free vibration modes from a Finite-Element analysis. The aerodynamic forces are calculated by a CFD solver in Arbitrary Lagrangian Eulerian (ALE) formulation. The integration of all involved disciplines is finally done via a weak coupling approach applying a CSS (Conventional-Serial-Staggered) algorithm. The integrated model is intended to be used for the prediction of maneuver or gust loads.

Item URL in elib:https://elib.dlr.de/70271/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Nonlinear numerical flight dynamics for the prediction of maneuver loads
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Journal or Publication Title:Proceedings "IFASD 2011"
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:numerical flight dynamics, fluid-structure-interaction, CFD, FE, CSM, TAU, maneuver loads, 6-DOF, elastic aircraft
Event Title:IFASD 2011 - 15th International Forum on Aeroelasticity and Structural Dynamics
Event Location:Paris, Frankreich
Event Type:international Conference
Event Dates:26 - 30 June 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:08 Nov 2011 13:39
Last Modified:31 Jul 2019 19:32

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