### Abstract

In this work we present a generic methodology for implementing, within the CATIA® modelling environment, a parametric model for typical free-form ships so that each instance is represented as a tangentially-continuous (G ^{1}-continuous) NURBS multi-patch surface. The methodology has been applied for constructing a container-ship parametric model that is able to generate robustly and efficiently valid hulls for a broad value range of the associated exposed parameters. The so-constructed parametric model is integrated with an, in-house developed, wave-resistance solver and the modeFrontier® optimizer for setting up an environment, that has been tested for optimizing the bow area of a container ship against the criterion of minimum wave resistance under the constraint of given displacement. Our solver adopts the Neumann-Kelvin formulation and combines the Boundary Element Method (BEM) with Isogeometric-Analysis (IGA) for the numerical solution of the resulting Boundary Integral Equation (BIE). It should be stressed that the IGA concept, recently introduced by Tom Hughes and his group at the University of Texas at Austin, aims to intrinsically integrate CAD with Analysis (FEM/BEM solver) by communicating the CAD model of the computation field to the solver without any approximation, e.g., panelization.

Original language | English |
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Title of host publication | RINA, Royal Institution of Naval Architects - International Conference on Computer Applications in Shipbuilding 2011, Papers |

Pages | 9-20 |

Number of pages | 12 |

Volume | 1 |

Publication status | Published - 2011 |

Externally published | Yes |

Event | International Conference on Computer Applications in Shipbuilding 2011 - Trieste, Italy Duration: Sep 20 2011 → Sep 22 2011 |

### Other

Other | International Conference on Computer Applications in Shipbuilding 2011 |
---|---|

Country | Italy |

City | Trieste |

Period | 9/20/11 → 9/22/11 |

### Fingerprint

### ASJC Scopus subject areas

- Computer Science Applications

### Cite this

*RINA, Royal Institution of Naval Architects - International Conference on Computer Applications in Shipbuilding 2011, Papers*(Vol. 1, pp. 9-20)

**A CATIA® ship-parametric model for isogeometric hull optimization with respect to wave resistance.** / Ginnis, A. I.; Feurer, C.; Belibassakis, K. A.; Kaklis, P. D.; Kostas, K. V.; Gerostathis, Th P.; Politis, C. G.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*RINA, Royal Institution of Naval Architects - International Conference on Computer Applications in Shipbuilding 2011, Papers.*vol. 1, pp. 9-20, International Conference on Computer Applications in Shipbuilding 2011, Trieste, Italy, 9/20/11.

}

TY - GEN

T1 - A CATIA® ship-parametric model for isogeometric hull optimization with respect to wave resistance

AU - Ginnis, A. I.

AU - Feurer, C.

AU - Belibassakis, K. A.

AU - Kaklis, P. D.

AU - Kostas, K. V.

AU - Gerostathis, Th P.

AU - Politis, C. G.

PY - 2011

Y1 - 2011

N2 - In this work we present a generic methodology for implementing, within the CATIA® modelling environment, a parametric model for typical free-form ships so that each instance is represented as a tangentially-continuous (G 1-continuous) NURBS multi-patch surface. The methodology has been applied for constructing a container-ship parametric model that is able to generate robustly and efficiently valid hulls for a broad value range of the associated exposed parameters. The so-constructed parametric model is integrated with an, in-house developed, wave-resistance solver and the modeFrontier® optimizer for setting up an environment, that has been tested for optimizing the bow area of a container ship against the criterion of minimum wave resistance under the constraint of given displacement. Our solver adopts the Neumann-Kelvin formulation and combines the Boundary Element Method (BEM) with Isogeometric-Analysis (IGA) for the numerical solution of the resulting Boundary Integral Equation (BIE). It should be stressed that the IGA concept, recently introduced by Tom Hughes and his group at the University of Texas at Austin, aims to intrinsically integrate CAD with Analysis (FEM/BEM solver) by communicating the CAD model of the computation field to the solver without any approximation, e.g., panelization.

AB - In this work we present a generic methodology for implementing, within the CATIA® modelling environment, a parametric model for typical free-form ships so that each instance is represented as a tangentially-continuous (G 1-continuous) NURBS multi-patch surface. The methodology has been applied for constructing a container-ship parametric model that is able to generate robustly and efficiently valid hulls for a broad value range of the associated exposed parameters. The so-constructed parametric model is integrated with an, in-house developed, wave-resistance solver and the modeFrontier® optimizer for setting up an environment, that has been tested for optimizing the bow area of a container ship against the criterion of minimum wave resistance under the constraint of given displacement. Our solver adopts the Neumann-Kelvin formulation and combines the Boundary Element Method (BEM) with Isogeometric-Analysis (IGA) for the numerical solution of the resulting Boundary Integral Equation (BIE). It should be stressed that the IGA concept, recently introduced by Tom Hughes and his group at the University of Texas at Austin, aims to intrinsically integrate CAD with Analysis (FEM/BEM solver) by communicating the CAD model of the computation field to the solver without any approximation, e.g., panelization.

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UR - http://www.scopus.com/inward/citedby.url?scp=84864647739&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9781905040872

VL - 1

SP - 9

EP - 20

BT - RINA, Royal Institution of Naval Architects - International Conference on Computer Applications in Shipbuilding 2011, Papers

ER -