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30 “Uncertainty-noise” Le Mans
Acoustique
&
Techniques n° 40
on the localization of the response observation point (the larger
the development area of the compensation, the larger the
compensation effect). For global response indicators, the
compensation intensity is thus important.
Practically, the selection of the random field discretization
mesh and the truncation ratio should be based on the
following considerations.
First, depending on the random field type and correlation
structure, it is possible to evaluate the theoretical number of
Fig. 1: Compensation effect on the displacement field u of a
clamped-free beam with random flexibility field F
Fig. 2 : Dispersion of the vertical displacement FRF
for a plate with random flatness default