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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