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Free-Flight Nonlinear Aeroelastic Simulations of the X-HALE UAV by an Extended Modal Approach

Ritter, Markus Raimund und Jones, Jessica und Cesnik, Carlos E. S. (2017) Free-Flight Nonlinear Aeroelastic Simulations of the X-HALE UAV by an Extended Modal Approach. IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics, 2017-06-26 - 2017-06-29, Como, Italien.

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Kurzfassung

A recently proposed method that extends the classical modal approach captures geometrically nonlinear effects in large structural deflections. The extensions account for nonlinear force displacement relationship by generalized quadratic and cubic stiffness terms and a geometrically nonlinear displacement field by quadratic, cubic, and fourth-order mode components. These extensions make the method particularly suitable for aeroelastic applications involving highly flexible structures and nonlinearities due to nonconservative loads. In this work, the method is enhanced by rigid body degrees of freedom to simulate a maneuvering, very flexible aircraft. Special emphasis is put on the derivation of a set of coupled differential equations of motion in which as few assumptions as possible are made with respect to structural deformations. The use of the mean-axes constraints is explicitely avoided, all inertial and gyroscopic coupling terms between rigid body and elastic motion are included. The setup of the aeroelastic framework based on an unsteady vortex-lattice method in the time doamin is presented in detail. University of Michigan's X-HALE UAV is the test case of this work. The results of dynamic maneuvers including tail input scenarios and gust encounters are presented and compared with results from UM/NAST.

elib-URL des Eintrags:https://elib.dlr.de/118369/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Free-Flight Nonlinear Aeroelastic Simulations of the X-HALE UAV by an Extended Modal Approach
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Ritter, Markus RaimundMarkus.Ritter (at) dlr.dehttps://orcid.org/0000-0003-3828-0397NICHT SPEZIFIZIERT
Jones, Jessicajrenejo (at) umich.eduNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Cesnik, Carlos E. S.cesnik (at) umich.eduNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:26 Juni 2017
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:very flexible aircraft, nonlinear flight dynamics, nonlinear aeroelasticity
Veranstaltungstitel:IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics
Veranstaltungsort:Como, Italien
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:26 Juni 2017
Veranstaltungsende:29 Juni 2017
Veranstalter :Politecnico di Milano, Associazione Italiana di Aeronautica e Astronautica AIDAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - VicToria (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Lastanalyse und Entwurf
Hinterlegt von: Ritter, Markus Raimund
Hinterlegt am:25 Jan 2018 13:53
Letzte Änderung:24 Apr 2024 20:22

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