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Numerical Simulation of Landing Gear Dynamics: State-of-the-art and Recent Developments

Krüger, Wolf und Morandi, Marco (2008) Numerical Simulation of Landing Gear Dynamics: State-of-the-art and Recent Developments. In: Proceedings - AVT-152 Symposium on Limit Cycle Oscillation and Other Amplitude-Limited Self-Excited Vibrations. AVT-152 Symposium on Limit Cycle Oscillation and Other Amplitude-Limited Self-Excited Vibrations, 2008-05-05 - 2008-05-08, Loen, Norway [Europe].

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Kurzfassung

Aircraft landing gears support the aircraft during ground operations, including take-off, landing impact, taxiing, gate handling and maintenance. Mostly for reasons of minimum mass and ground clearance, landing gears are slender structures which exhibit a considerable dynamic response to ground load excitiations. As the landing gear is one of the few systems on the aircraft without redundancies, the knowledge of landing gear dynamics is crucial for aircraft design and aircraft safety. Simulation of landing gear dynamics is a cornerstone of aircraft loads analysis, as well for vertical loads resulting from touch-down as for longitudinal and lateral loads resulting from braking, steering and towing. Another important field of interest are landing gear vibrations like gear walk and shimmy. Those phenomena can be brake induced or result from tire spin up at touch-down or simply from a coupling of dynamics of the running tire and structural mechanics of the landing gear leg. All those effects strongly depend on a number of parameters such as aircraft speed, landing gear vertical deflection, tire pressure and wear of the parts. Many of those parameters can only be estimated and might change during the operation of the aircraft. Numerical investigation is thus a challenging task. Analysis methods exist both in the frequency domain and in the time domain. As stability analysis is straight forward in frequency domain methods, this approach is still often used. However, in many cases non-linearities are dominant which lead to limitcycle characteristics of the vibrations. Here, multibody modelling or a mixture of multibody and finite element modelling including time domain simulation is used. In the paper, a general outline is given of how vibration problems in landing gears can be treated by numerical analysis methods. The paper will start with a classification of typical problems, give a short overview of classical papers, and explain typical approaches. In addition, alternative approaches for stability analysis and for the detection of LCOs as well as state-olf-the-art modelling approaches will be presented.

elib-URL des Eintrags:https://elib.dlr.de/54423/
Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Numerical Simulation of Landing Gear Dynamics: State-of-the-art and Recent Developments
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Krüger, WolfNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Morandi, MarcoPolitecnico Di Milano, Dipartimento di Ingegneria AerospazialeNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2008
Erschienen in:Proceedings - AVT-152 Symposium on Limit Cycle Oscillation and Other Amplitude-Limited Self-Excited Vibrations
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:aircraft, landing gear, LCO
Veranstaltungstitel:AVT-152 Symposium on Limit Cycle Oscillation and Other Amplitude-Limited Self-Excited Vibrations
Veranstaltungsort:Loen, Norway [Europe]
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:5 Mai 2008
Veranstaltungsende:8 Mai 2008
Veranstalter :NATO RTO
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Flexibles Flugzeug (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik
Hinterlegt von: Erdmann, Daniela
Hinterlegt am:30 Jun 2008
Letzte Änderung:24 Apr 2024 19:18

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