Geometric Modelling and Deformation for Shape Optimization of Ship Hulls and Appendages

Elisa Berrini 1, 2 Bernard Mourrain 2 Yann Roux 1, 3 Mathieu Durand 3 Guillaume Fontaine 3
2 AROMATH - AlgebRe, geOmetrie, Modelisation et AlgoriTHmes
CRISAM - Inria Sophia Antipolis - Méditerranée , UoA - University of Athens
Abstract : The precise control of geometric models plays an important role in many domains such as computer-aided geometric design and numerical simulation. For shape optimization in computational fluid dynamics (CFD), the choice of control parameters and the way to deform a shape are critical. In this article, we describe a skeleton-based representation of shapes adapted for CFD simulation and automatic shape optimization. Instead of using the control points of a classic B-spline representation, we control the geometry in terms of architectural parameters. We assure valid shapes with a strong shape consistency control. Deformations of the geometry are performed by solving optimization problems on the skeleton. Finally, a surface reconstruction method is proposed to evaluate the shape's performances with CFD solvers. We illustrate the approach on two problems: the foil of an AC45 racing sail boat and the bulbous bow of a fishing trawler. For each case, we obtained a set of shape deformations and then we evaluated and analyzed the performances of the different shapes with CFD computations.
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Article dans une revue
Journal of Ship Research, 2017, 61 (2), pp.91-106. 〈10.5957/JOSR.61.2.160059〉
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Elisa Berrini, Bernard Mourrain, Yann Roux, Mathieu Durand, Guillaume Fontaine. Geometric Modelling and Deformation for Shape Optimization of Ship Hulls and Appendages. Journal of Ship Research, 2017, 61 (2), pp.91-106. 〈10.5957/JOSR.61.2.160059〉. 〈hal-01373249v4〉

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