Ship-hull shape optimization with a T-spline based BEM-isogeometric solver

K. V. Kostas, A. I. Ginnis, C. G. Politis, P. D. Kaklis

Research output: Contribution to journalArticlepeer-review

102 Citations (Scopus)
417 Downloads (Pure)


In this work, we present a ship-hull optimization process combining a T-spline based parametric ship-hull model and an Isogeometric Analysis (IGA) hydrodynamic solver for the calculation of ship wave resistance. The surface representation of the ship-hull instances comprise one cubic T-spline with extraordinary points, ensuring C2 continuity everywhere except for the vicinity of extraordinary points where G1 continuity is achieved. The employed solver for ship wave resistance is based on the Neumann-Kelvin formulation of the problem, where the resulting Boundary Integral Equation is numerically solved using a higher order collocated Boundary Element Method which adopts the IGA concept and the T-spline representation for the ship-hull surface. The hydrodynamic solver along with the ship parametric model are subsequently integrated within an appropriate optimization environment for local and global ship-hull optimizations against the criterion of minimum resistance.

Original languageEnglish
Pages (from-to)611-622
Number of pages12
JournalComputer Methods in Applied Mechanics and Engineering
Early online date27 Oct 2014
Publication statusPublished - 1 Feb 2015


  • shape-optimization
  • ship-hull
  • T-splines
  • wave-resistance
  • boundary element method


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