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Shape Sensing and Load Reconstruction for Static and Dynamic Applications

Minigher, Paolo (2022) Shape Sensing and Load Reconstruction for Static and Dynamic Applications. Masterarbeit, Delft University of Technology.

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Offizielle URL: https://repository.tudelft.nl/islandora/object/uuid:7400c81a-c5bf-4422-bc2b-c5870dae46f6?collection=education

Kurzfassung

The reconstruction of the elastic deformed shape of a structure from strain measurements is a field which has received considerable attention over the years. This work aims to suggest some improvements for wing-like structures trying to limit as much as possible the amount of strain measurements needed. In particular, a simple beam model is proposed based on the framework of the inverse Finite Element Method (iFEM). Then, the performances of iFEM using shell elements will be enhanced pre-extrapolating the strain field and the results will be compared with another shape sensing method, the so-called Modal Method (MM). In the final part of the work the external loads under the form of a pressure field are recovered using both the reconstructed displacements and directly the strain measurements. Both static and dynamic analyses will be carried out, so recovering the load both in space and in time. The results obtained show that the beam model developed allows to obtain a satisfactory bending reconstruction of the structure, while the twist is not always accurate. Computing the full displacement field with iFEM brings to a relatively good representation, even though not as satisfactory as the one delivered by the Modal Method. Finally, recovering the static external loads directly from the strain measurements seems to perform better compared to the reconstruction from the full displacement field, but it is significantly affected by noise and uncertainties. The dynamic load reconstruction is in general much more challenging and the results obtained often show a significant error compared to the reference solution.

elib-URL des Eintrags:https://elib.dlr.de/189012/
Dokumentart:Hochschulschrift (Masterarbeit)
Titel:Shape Sensing and Load Reconstruction for Static and Dynamic Applications
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Minigher, Paolopaolo.minigher (at) dlr.dehttps://orcid.org/0000-0002-6680-9246NICHT SPEZIFIZIERT
Datum:5 August 2022
Erschienen in:TU Delft Repository
Referierte Publikation:Nein
Open Access:Ja
Seitenanzahl:271
Status:veröffentlicht
Stichwörter:Shape Sensing, iFEM, Modal Method, Load Sensing, Uncertainty Analysis
Institution:Delft University of Technology
Abteilung:Department of Aerospace Structures and Materials
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Effizientes Luftfahrzeug
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L EV - Effizientes Luftfahrzeug
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Flugzeug und Validierung
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Strukturdynamik und Systemidentifikation
Hinterlegt von: Gundlach, Janto
Hinterlegt am:14 Okt 2022 14:35
Letzte Änderung:31 Jan 2023 03:00

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  • Shape Sensing and Load Reconstruction for Static and Dynamic Applications. (deposited 14 Okt 2022 14:35) [Gegenwärtig angezeigt]

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