Dynamics of geometrically-nonlinear beam structures, part 2: Experimental analysis

Publikation: Beitrag in Buch/Bericht/Sammelwerk/KonferenzbandAufsatz in KonferenzbandForschungPeer-Review

Autoren

  • D. Anastasio
  • J. P. Noël
  • G. Kerschen
  • S. Marchesiello
  • J. Häfele
  • C. G. Gebhardt
  • R. Rolfes
  • J. Dietrich

Organisationseinheiten

Externe Organisationen

  • Politecnico di Torino (POLITO)
  • Université de Liège
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Details

OriginalspracheEnglisch
Titel des SammelwerksNonlinear structures and systems, volume 1
UntertitelProceedings of the 37th IMAC, a conference and exposition on structural dynamics 2019
Herausgeber/-innenGaetan Kerschen, M.R.W. Brake, Ludovic Renson
ErscheinungsortCham
Herausgeber (Verlag)Springer Verlag
Seiten217-220
Seitenumfang4
ISBN (elektronisch)9783030123918
ISBN (Print)9783030123901
PublikationsstatusVeröffentlicht - 29 Juni 2019
Veranstaltung37th IMAC, A Conference and Exposition on Structural Dynamics, 2019 - Orlando, USA / Vereinigte Staaten
Dauer: 28 Jan. 201931 Jan. 2019

Publikationsreihe

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (elektronisch)2191-5652

Abstract

System identification is a key tool to gather information about dynamical structures. In the last decades, important steps have been made to perform this task in the presence of localized nonlinearities. However, the continual interest in improving structural performance has created the need of designing light and flexible elements in several engineering fields. These elements are usually characterized by moderate and large deformations, exhibiting distributed nonlinearities. System identification of structures with distributed nonlinear features remains particularly challenging, especially when dealing with experimental data. This work proposes a method to perform such a task, relying on a convenient basis reduction of the measured signals. The identification is then performed using the nonlinear subspace identification method (NSI) in the reduced domain together with a closed-form nonlinear description. This methodology is validated on an experimental structure, consisting of a very thin steel beam that is clamped at both ends. Excited with a multisine, the beam undergoes large amplitude oscillations. A final objective of the identification is to exploit its response through the correct identification of the parameters that define the nonlinearity. Results show a high level of accuracy, which validates the effectiveness of the methodology and paves the way toward the identification of more complex real-life structures exhibiting large deformations.

ASJC Scopus Sachgebiete

Zitieren

Dynamics of geometrically-nonlinear beam structures, part 2: Experimental analysis. / Anastasio, D.; Noël, J. P.; Kerschen, G. et al.
Nonlinear structures and systems, volume 1: Proceedings of the 37th IMAC, a conference and exposition on structural dynamics 2019. Hrsg. / Gaetan Kerschen; M.R.W. Brake; Ludovic Renson. Cham: Springer Verlag, 2019. S. 217-220 (Conference Proceedings of the Society for Experimental Mechanics Series).

Publikation: Beitrag in Buch/Bericht/Sammelwerk/KonferenzbandAufsatz in KonferenzbandForschungPeer-Review

Anastasio, D, Noël, JP, Kerschen, G, Marchesiello, S, Häfele, J, Gebhardt, CG, Rolfes, R & Dietrich, J 2019, Dynamics of geometrically-nonlinear beam structures, part 2: Experimental analysis. in G Kerschen, MRW Brake & L Renson (Hrsg.), Nonlinear structures and systems, volume 1: Proceedings of the 37th IMAC, a conference and exposition on structural dynamics 2019. Conference Proceedings of the Society for Experimental Mechanics Series, Springer Verlag, Cham, S. 217-220, 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019, Orlando, USA / Vereinigte Staaten, 28 Jan. 2019. https://doi.org/10.1007/978-3-030-12391-8_29
Anastasio, D., Noël, J. P., Kerschen, G., Marchesiello, S., Häfele, J., Gebhardt, C. G., Rolfes, R., & Dietrich, J. (2019). Dynamics of geometrically-nonlinear beam structures, part 2: Experimental analysis. In G. Kerschen, M. R. W. Brake, & L. Renson (Hrsg.), Nonlinear structures and systems, volume 1: Proceedings of the 37th IMAC, a conference and exposition on structural dynamics 2019 (S. 217-220). (Conference Proceedings of the Society for Experimental Mechanics Series). Springer Verlag. https://doi.org/10.1007/978-3-030-12391-8_29
Anastasio D, Noël JP, Kerschen G, Marchesiello S, Häfele J, Gebhardt CG et al. Dynamics of geometrically-nonlinear beam structures, part 2: Experimental analysis. in Kerschen G, Brake MRW, Renson L, Hrsg., Nonlinear structures and systems, volume 1: Proceedings of the 37th IMAC, a conference and exposition on structural dynamics 2019. Cham: Springer Verlag. 2019. S. 217-220. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-030-12391-8_29
Anastasio, D. ; Noël, J. P. ; Kerschen, G. et al. / Dynamics of geometrically-nonlinear beam structures, part 2 : Experimental analysis. Nonlinear structures and systems, volume 1: Proceedings of the 37th IMAC, a conference and exposition on structural dynamics 2019. Hrsg. / Gaetan Kerschen ; M.R.W. Brake ; Ludovic Renson. Cham : Springer Verlag, 2019. S. 217-220 (Conference Proceedings of the Society for Experimental Mechanics Series).
Download
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abstract = "System identification is a key tool to gather information about dynamical structures. In the last decades, important steps have been made to perform this task in the presence of localized nonlinearities. However, the continual interest in improving structural performance has created the need of designing light and flexible elements in several engineering fields. These elements are usually characterized by moderate and large deformations, exhibiting distributed nonlinearities. System identification of structures with distributed nonlinear features remains particularly challenging, especially when dealing with experimental data. This work proposes a method to perform such a task, relying on a convenient basis reduction of the measured signals. The identification is then performed using the nonlinear subspace identification method (NSI) in the reduced domain together with a closed-form nonlinear description. This methodology is validated on an experimental structure, consisting of a very thin steel beam that is clamped at both ends. Excited with a multisine, the beam undergoes large amplitude oscillations. A final objective of the identification is to exploit its response through the correct identification of the parameters that define the nonlinearity. Results show a high level of accuracy, which validates the effectiveness of the methodology and paves the way toward the identification of more complex real-life structures exhibiting large deformations.",
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