Options
CAD-free hydrodynamic optimisation using consistent kernel-based sensitivity filtering
Publikationstyp
Journal Article
Date Issued
2015-10-01
Sprache
English
Author(s)
Institut
TORE-URI
Journal
Volume
62
Issue
3
Start Page
111
End Page
130
Citation
Ship Technology Research 3 (62): 111-130 (2015-10-01)
Publisher DOI
Scopus ID
Publisher
Taylor and Francis
This paper advocates the benefits of consistent kernel-based filter functions dedicated to the filtering of shape sensitivities obtained from CAD-free adjoint hydrodynamic shape optimisation procedures. Emphasis is given to explicit corrections of truncated Gaussian filters in discrete space subjected to first-order consistency constraints. The nature of the approach supports an irregular distribution of surface-mesh points without modifying the shape sensitivity influences. The methodology facilitates an apparently simple explicit Lagrangian surface parameterisation at a moderate computational surplus. Results indicate benefits of a consistent approach as regards the conservation of surface-mesh properties and the approach towards optima. Examples indicate the practical impact for aftship and wake-equalising duct examples. Accordingly, O(150) designs that feature large (local) deformations of the initial shape can be examined during a few hours of turn-around time using a single tool rather than a tool chain.
Subjects
Adjoint sensitivity computation
CAD-free shape optimisation
Kernel-based vectorial filtering
Navier-Stokes simulations
Ship hydrodynamics
Wake quality
DDC Class
600: Technik
More Funding Information
The current work is a part of the research project ‘NoWelle’ funded by the German Federal Ministry for Economic Affairs and Energy (BMWi, grant no. 03FX362).