Today the adjustment of structural models is an essential step in the
modeling of complex structures. In this paper, we are interested in th
e improvement of finite element models. Our approach is a parametric u
pdating using modal test results, which supply eigenvalues and associa
ted eigenvectors. It is based on the computation of the error measure
on the constitutive relation and allows us to correct both the stiffne
ss and the mass matrices. In particular, this paper shows how this tun
ing strategy can improve a given finite element model when the measure
s are noisy. Several simulation examples illustrate the behavior of th
is method.