Aim of the present study is the identification of equivalent viscoelastic models for layered plates, obtained from vibration measurements only, able to fit the experimental data on relatively broad frequency ranges by means of a minimum number of parameters. A novel approach is proposed, based on a definition of an equivalent modal damping ratio applied to the circle-fit technique, to overcome the difficulties related to the identification of modal parameters when adopting non-conventional viscoelastic models. If the structural internal dissipative effects are dominant, this procedure identifies the parameters of an equivalent Young’s modulus in the frequency domain, representing the viscoelastic properties of a homogenized structure as a scalar function with frequency-dependent real and imaginary parts. The proposed procedure is applied to the analysis of Aluminum plates coated by damping pads and of plates made by Quiet Aluminum. To fit the experimentally found equivalent modal damping ratios, the linear Fractional Kelvin-Voigt viscoelastic model is adopted, assessing the accuracy of the identified parameters by comparison of numerically simulated with experimentally measured frequency response functions.

Experimental identification of equivalent viscoelastic models for vibrating plates / Grosso, Pasquale; De Felice, Alessandro; Sorrentino, Silvio. - (2021). (Intervento presentato al convegno 27th International Congress on Sound and Vibration (ICSV27) tenutosi a Virtual online nel 11-16 luglio 2021).

Experimental identification of equivalent viscoelastic models for vibrating plates.

Grosso, Pasquale;De Felice, Alessandro
;
Sorrentino, Silvio
2021

Abstract

Aim of the present study is the identification of equivalent viscoelastic models for layered plates, obtained from vibration measurements only, able to fit the experimental data on relatively broad frequency ranges by means of a minimum number of parameters. A novel approach is proposed, based on a definition of an equivalent modal damping ratio applied to the circle-fit technique, to overcome the difficulties related to the identification of modal parameters when adopting non-conventional viscoelastic models. If the structural internal dissipative effects are dominant, this procedure identifies the parameters of an equivalent Young’s modulus in the frequency domain, representing the viscoelastic properties of a homogenized structure as a scalar function with frequency-dependent real and imaginary parts. The proposed procedure is applied to the analysis of Aluminum plates coated by damping pads and of plates made by Quiet Aluminum. To fit the experimentally found equivalent modal damping ratios, the linear Fractional Kelvin-Voigt viscoelastic model is adopted, assessing the accuracy of the identified parameters by comparison of numerically simulated with experimentally measured frequency response functions.
2021
16-lug-2021
27th International Congress on Sound and Vibration (ICSV27)
Virtual online
11-16 luglio 2021
Grosso, Pasquale; De Felice, Alessandro; Sorrentino, Silvio
Experimental identification of equivalent viscoelastic models for vibrating plates / Grosso, Pasquale; De Felice, Alessandro; Sorrentino, Silvio. - (2021). (Intervento presentato al convegno 27th International Congress on Sound and Vibration (ICSV27) tenutosi a Virtual online nel 11-16 luglio 2021).
File in questo prodotto:
File Dimensione Formato  
ICSV27-2021.pdf

Accesso riservato

Tipologia: Versione pubblicata dall'editore
Dimensione 655.51 kB
Formato Adobe PDF
655.51 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1271166
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact