Four suggestions for better parametric geometries
Four suggestions for better parametric geometries
The key challenge in building a parametric geometry for any stage stage of the aircraft design process is finding the right balance between the often competing objectives of conciseness, robustness and flexibility. This paper proposes four ways, in which the tensions between these objectives may be addressed. First, we describe a framework for parameterizing geometries at the concept selection level, using a hierarchical encoding. Second, we advocate the clear separation of shape and scale as part of the aerodynamic design process, leading to a non-dimensional shape design phase and a scaling based on performance constraint analysis. Third, we suggest improving flexibility without major robustness compromises by using functionals, instead of parametric functions, to describe the shapes of various components of a geometry. Finally, we discuss geometry-attached curvilinear coordinates as a means of simplifying the parameterization of complicated geometries
1-10
American Institute of Aeronautics and Astronautics
Sobester, Andras
096857b0-cad6-45ae-9ae6-e66b8cc5d81b
January 2014
Sobester, Andras
096857b0-cad6-45ae-9ae6-e66b8cc5d81b
Sobester, Andras
(2014)
Four suggestions for better parametric geometries.
In 10th AIAA Multidisciplinary Design Optimization Conference.
American Institute of Aeronautics and Astronautics.
.
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Conference or Workshop Item
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Abstract
The key challenge in building a parametric geometry for any stage stage of the aircraft design process is finding the right balance between the often competing objectives of conciseness, robustness and flexibility. This paper proposes four ways, in which the tensions between these objectives may be addressed. First, we describe a framework for parameterizing geometries at the concept selection level, using a hierarchical encoding. Second, we advocate the clear separation of shape and scale as part of the aerodynamic design process, leading to a non-dimensional shape design phase and a scaling based on performance constraint analysis. Third, we suggest improving flexibility without major robustness compromises by using functionals, instead of parametric functions, to describe the shapes of various components of a geometry. Finally, we discuss geometry-attached curvilinear coordinates as a means of simplifying the parameterization of complicated geometries
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Published date: January 2014
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Computational Engineering & Design Group
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Local EPrints ID: 364385
URI: http://eprints.soton.ac.uk/id/eprint/364385
PURE UUID: c0cb30fb-d447-45c5-bd17-17f3514e724d
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Date deposited: 28 Apr 2014 08:14
Last modified: 16 Mar 2024 03:26
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