Skip to Main content Skip to Navigation
Journal articles

Improvement of code behavior in a design of experiments by metamodeling

Abstract : It is now common practice in nuclear engineering to base extensive studies on numerical computer models. These studies require to run computer codes in potentially thousands of numerical configurations and without expert individual controls on the computational and physical aspects of each simulations.In this paper, we compare different statistical metamodeling techniques and show how metamodels can help to improve the global behaviour of codes in these extensive studies. We consider the metamodeling of the Germinal thermalmechanical code by Kriging, kernel regression and neural networks. Kriging provides the most accurate predictions while neural networks yield the fastest metamodel functions. All three metamodels can conveniently detect strong computation failures. It is however significantly more challenging to detect code instabilities, that is groups of computations that are all valid, but numerically inconsistent with one another. For code instability detection, we find that Kriging provides the most useful tools.
Keywords : Metamodeling
Complete list of metadatas

Cited literature [30 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-02382795
Contributor : Amplexor Amplexor <>
Submitted on : Wednesday, November 27, 2019 - 1:09:49 PM
Last modification on : Saturday, October 3, 2020 - 3:26:46 AM

File

201500004022.pdf
Files produced by the author(s)

Identifiers

Citation

François Bachoc, Karim Ammar, Jean-Marc Martinez. Improvement of code behavior in a design of experiments by metamodeling. Nuclear Science and Engineering, Academic Press, 2016, 183 (3), pp.387-406. ⟨10.13182/NSE15-108⟩. ⟨cea-02382795⟩

Share

Metrics

Record views

173

Files downloads

278