Updating of GARTEUR benchmark using resonances and antiresonances

In this paper an extension of the antiresonance-based model updating method that allows the use of previously identified modal data is proposed. It relies on estimating antiresonances of unmeasured point FRFs. Such FRFs are synthesised through truncated modal expansion. Although modal truncation may seriously affect the location of antiresonances, this effect can be compensated using appropriate low and high frequency residuals accounting for the contribution of truncated modes. Since such residuals are not known for unmeasured FRFs, they are computed theoretically using rigid body and upper analytical modes. The method is therefore applied to the Finite Element model updating of the GARTEUR benchmark: the various steps of the process (modelling assumptions, selection of correction parameters, sensitivity analysis, final results) are carefully described and discussed.