Affiliations: Dipartimento di Energetica, Università de L'Aquila,
Località Monteluco, I-67040 Roio Poggio (AQ), Italy | Dipartimento di Meccanica e Aeronautica, Università
di Roma "La Sapienza", Via Eudossiana 18, I-00184 Roma, Italy
Note: [] Corresponding author: Walter D'Ambrogio, Dipartimento di
Energetica, Università de L'Aquila, Località Monteluco, I-67040 Roio Poggio
(AQ), Italy. Tel.: +39 08624 34352; Fax: +39 08624 34303; E-mail:
dambro@ing.univaq.it
Abstract: This paper considers an extension of the model updating method that
minimizes the antiresonance error, besides the natural frequency error. By
defining virtual antiresonances, this extension allows the use of previously
identified modal data. Virtual antiresonances can be evaluated from a truncated
modal expansion, and do not correspond to any physical system. The method is
applied to the Finite Element model updating of the GARTEUR benchmark, used
within an European project on updating. Results are compared with those
previously obtained by estimating actual antiresonances after computing low and
high frequency residuals, and with results obtained by using the correlation
(MAC) between identified and analytical mode shapes.
