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  4. Reduced Order Modelling of Nonaffine Problems on Parameterized NURBS Multipatch Geometries
 
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Reduced Order Modelling of Nonaffine Problems on Parameterized NURBS Multipatch Geometries

Chasapi, Margarita  
•
Antolin, Pablo  
•
Buffa, Annalisa  
Rozza, Gianluigi  
•
Stabile, Giovanni
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June 25, 2024
Reduction, Approximation, Machine Learning, Surrogates, Emulators and Simulators

This contribution explores the combined capabilities of reduced basis methods and IsoGeometric Analysis (IGA) in the context of parameterized partial differential equations. The introduction of IGA enables a unified simulation framework based on a single geometry representation for both design and analysis. The coupling of reduced basis methods with IGA has been motivated in particular by their combined capabilities for geometric design and solution of parameterized geometries. In most IGA applications, the geometry is modelled by multiple patches with different physical or geometrical parameters. In particular, we are interested in nonaffine problems characterized by a high-dimensional parameter space. We consider the Empirical Interpolation Method (EIM) to recover an affine parametric dependence and combine domain decomposition to reduce the dimensionality. We couple spline patches in a parameterized setting, where multiple evaluations are performed for a given set of geometrical parameters, and employ the Static Condensation Reduced Basis Element (SCRBE) method. At the common interface between adjacent patches a static condensation procedure is employed, whereas in the interior a reduced basis approximation enables an efficient offline/online decomposition. The full order model over which we setup the RB formulation is based on NURBS approximation, whereas the reduced basis construction relies on techniques such as the Greedy algorithm or proper orthogonal decomposition (POD). We demonstrate the developed procedure using an illustrative model problem on a three-dimensional geometry featuring a multi-dimensional geometrical parameterization.

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Type
book part or chapter
DOI
10.1007/978-3-031-55060-7_4
Scopus ID

2-s2.0-85200505016

Author(s)
Chasapi, Margarita  

École Polytechnique Fédérale de Lausanne

Antolin, Pablo  

École Polytechnique Fédérale de Lausanne

Buffa, Annalisa  

École Polytechnique Fédérale de Lausanne

Editors
Rozza, Gianluigi  
•
Stabile, Giovanni
•
Gunzburger, Max
•
D'Elia, Marta
Date Issued

2024-06-25

Publisher

Springer Science and Business Media Deutschland GmbH

Published in
Reduction, Approximation, Machine Learning, Surrogates, Emulators and Simulators
DOI of the book
https://doi.org/10.1007/978-3-031-55060-7
ISBN of the book

9783031550591

9783031550621

9783031550607

Edition

1st

Total of pages

259

Start page

67

End page

87

Series title/Series vol.

Lecture Notes in Computational Science and Engineering; 151

ISSN (of the series)

2197-7100

1439-7358

Volume
151
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
MNS  
FunderFunding(s)Grant NumberGrant URL

Swiss Innovation Agency

46684.1 IP-EE

Available on Infoscience
January 27, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/245350
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