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Journal Articles Journal of Ship Research Year : 2017

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

Yann Roux
  • Function : Author
Mathieu Durand
Guillaume Fontaine
  • Function : Author

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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Dates and versions

hal-01373249 , version 1 (28-09-2016)
hal-01373249 , version 2 (17-10-2016)
hal-01373249 , version 3 (23-01-2017)
hal-01373249 , version 4 (11-05-2017)

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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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