Adaptive design experiment and non-stationary kriging : applications to uncertainty analysis in nuclear mechanical studies
Résumé
This work aims at integrating uncertainties in mechanical analysis with complex
computer codes from nuclear safety studies. More precisely, it is intended to
analyse if the variations of the uncertain code inputs can drastically change the
behaviour of the system or even turn the system into a non-secure state. To do so,
numerical design of experiments methods based on spatial statistics can be used for
launching new simulations in the most relevant areas (high variation areas, over
sets, ...). These methods are based on a modeling of the response with an
interpolating Gaussian process. The covariance of the process is often assumed
stationary, whereas this strong hypothesis leads sometime to poor predictions.
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