In many engineering application there are many instances in which it is convenient to be able to consider a complex engineering structure as an assembly of simpler components or substructures. Similarly, there exist applications in which, for model validation purposes, it might be important to identify the dynamic behavior of the structural subsystem starting from the known dynamic behavior of the coupled system and from information about the remaining part of the structural system. However, if the theoretical framework for Frequency Based Substructuring (FBS) has been widely studied and demonstrated, measurement errors, ill-conditioning and difficulties in measuring all required degrees of freedom—in particular at the connections—lead to poor results when trying to apply these techniques to real structures. This paper will focus on the analysis of the results obtained by applying Experimental Frequency-Based Substructuring on a test structure, both for coupling and decoupling applications and under different boundary conditions. The paper will particularly discuss the effects of typical measurement errors on the final results and potential techniques that could be used to improve the robustness and applicability of this methodology.

Experimental Coupling and Decoupling of Engineering Structures Using Frequency-Based Substructuring

D'AMBROGIO, WALTER;
2016-01-01

Abstract

In many engineering application there are many instances in which it is convenient to be able to consider a complex engineering structure as an assembly of simpler components or substructures. Similarly, there exist applications in which, for model validation purposes, it might be important to identify the dynamic behavior of the structural subsystem starting from the known dynamic behavior of the coupled system and from information about the remaining part of the structural system. However, if the theoretical framework for Frequency Based Substructuring (FBS) has been widely studied and demonstrated, measurement errors, ill-conditioning and difficulties in measuring all required degrees of freedom—in particular at the connections—lead to poor results when trying to apply these techniques to real structures. This paper will focus on the analysis of the results obtained by applying Experimental Frequency-Based Substructuring on a test structure, both for coupling and decoupling applications and under different boundary conditions. The paper will particularly discuss the effects of typical measurement errors on the final results and potential techniques that could be used to improve the robustness and applicability of this methodology.
2016
978-3-319-29762-0
978-3-319-29763-7
File in questo prodotto:
File Dimensione Formato  
10.1007:978-3-319-29763-7_45.pdf

solo utenti autorizzati

Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 3.48 MB
Formato Adobe PDF
3.48 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
132_man.pdf

accesso aperto

Tipologia: Documento in Pre-print
Licenza: Creative commons
Dimensione 1.46 MB
Formato Adobe PDF
1.46 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/100041
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact