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Four suggestions for better parametric geometries

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 exibility. 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 exibility 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
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. pp. 1-10 .

Record type: Conference or Workshop Item (Paper)

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 exibility. 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 exibility 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
Organisations: Computational Engineering & Design Group

Identifiers

Local EPrints ID: 364385
URI: http://eprints.soton.ac.uk/id/eprint/364385
PURE UUID: c0cb30fb-d447-45c5-bd17-17f3514e724d
ORCID for Andras Sobester: ORCID iD orcid.org/0000-0002-8997-4375

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Date deposited: 28 Apr 2014 08:14
Last modified: 01 Oct 2019 00:53

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