Füllekrug, U. und Göge, D. (2005) Non-linear analysis of aerospace structures with weak non-linearities and coupled modes. IMAC XXIII - International Modal Analysis Conference,Orlando, USA, 27-30 January 2005.
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Kurzfassung
The modal identification of large aerospace structures like aircraft prototypes or satellites requires a great experimental effort and sophisticated test concepts in order to assure a high quality for the test results. The conventional modal identification assumes linear dynamic behaviour of the structure. However, in practice most of the investigated and tested structures exhibit some non-linear behaviour. In this article, a test concept suited for the modal identification of large aerospace structures is presented first. Then, the basics for non-linear modal identification within this concept are described. For most of the modes the non-linearity is only weak and most of the non-linear modes can be considered as uncoupled, i.e. other modes are not influenced by the non-linearity of the respective mode. However, some of the non-linear modes may be coupled with other modes. The article describes the theoretical basis for the non-linear modal identification of one single uncoupled mode and for the case of non-linear coupled modes. To illustrate the non-linear modal identification, an analytical model is investigated which features the coupling of two modes. The application of the method to measured data of a large aircraft structure demonstrates that the method can be used to identify the non-linear characteristics of aerospace structures.
elib-URL des Eintrags: | https://elib.dlr.de/14501/ | ||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||
Zusätzliche Informationen: | LIDO-Berichtsjahr=2005, | ||||||||||||
Titel: | Non-linear analysis of aerospace structures with weak non-linearities and coupled modes | ||||||||||||
Autoren: |
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Datum: | 2005 | ||||||||||||
Open Access: | Nein | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Nein | ||||||||||||
In ISI Web of Science: | Nein | ||||||||||||
Seitenbereich: | Seiten 1-15 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | Ground Vibration Test, Modal Survey Testing, Identification of Non-Linearities, Coupled Modes | ||||||||||||
Veranstaltungstitel: | IMAC XXIII - International Modal Analysis Conference,Orlando, USA, 27-30 January 2005 | ||||||||||||
Veranstalter : | Society for Experimental Mechanics Inc. | ||||||||||||
HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||
HGF - Programmthema: | keine Zuordnung | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L ST - Starrflüglertechnologien | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Flexibles Flugzeug (alt) | ||||||||||||
Standort: | Göttingen | ||||||||||||
Institute & Einrichtungen: | Institut für Aeroelastik | ||||||||||||
Hinterlegt von: | Erdmann, Daniela | ||||||||||||
Hinterlegt am: | 16 Sep 2005 | ||||||||||||
Letzte Änderung: | 14 Jan 2010 21:56 |
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