Dynamic Model Updating Using Virtual Antiresonances | Zendy

Walter D’Ambrogio | Zendy; Annalisa Fregolent | Zendy

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Dynamic Model Updating Using Virtual Antiresonances

Author(s) -

Walter D’Ambrogio,

Annalisa Fregolent

Publication year - 2004

Publication title -

shock and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.418

H-Index - 45

eISSN - 1875-9203

pISSN - 1070-9622

DOI - 10.1155/2004/570128

Subject(s) - benchmark (surveying) , modal , computer science , finite element method , algorithm , extension (predicate logic) , antiresonance , mode (computer interface) , data mining , engineering , structural engineering , chemistry , geodesy , polymer chemistry , programming language , electrical engineering , piezoelectricity , geography , operating system

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

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