Local shape optimisation of a firtree root using NURBS
Local shape optimisation of a firtree root using NURBS
This paper describes a general shape optimisation method for a structural optimisation problem using a combined feature-based and B-spline based free form geometry modelling approach. The geometry is defined by a number of features for the global shape and by Non-Uniform Rational B-splines (NURBS), via the use of control points for the local shape. The coordinates of the control points along with other dimensions are chosen as design variables. A knot insertion/removal process is introduced to increase flexibility and to obtain a compact definition of the final optimised shape. Here the geometry is modelled using an intelligent CAD system (ICAD), which enables complete automation of the design-to-analysis process. Stresses are obtained from finite element analysis. A two-stage hybrid strategy is used to solve the formulated optimisation problem. Its application to the design of a turbine disc firtree root is demonstrated. This new approach is compared to a more traditional optimisation analysis using ageometry model based on straight-lines and circular arcs. Improvements in the objective function and flexibility in geometry definition are achieved compared to designs obtained using the traditional approach.
American Institute of Aeronautics and Astronautics
Song, Wenbin
390dc209-bfcb-4986-8362-c25b40272307
Keane, Andy J.
26d7fa33-5415-4910-89d8-fb3620413def
Rees, Janet
9caccbae-e72c-4377-87ec-66fed11800d4
Bhaskar, Atul
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Bagnall, Steven
4c32424a-9b06-4902-912c-8d03a0ac964f
2002
Song, Wenbin
390dc209-bfcb-4986-8362-c25b40272307
Keane, Andy J.
26d7fa33-5415-4910-89d8-fb3620413def
Rees, Janet
9caccbae-e72c-4377-87ec-66fed11800d4
Bhaskar, Atul
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Bagnall, Steven
4c32424a-9b06-4902-912c-8d03a0ac964f
Song, Wenbin, Keane, Andy J., Rees, Janet, Bhaskar, Atul and Bagnall, Steven
(2002)
Local shape optimisation of a firtree root using NURBS.
In Proceedings of the 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization.
American Institute of Aeronautics and Astronautics..
Record type:
Conference or Workshop Item
(Paper)
Abstract
This paper describes a general shape optimisation method for a structural optimisation problem using a combined feature-based and B-spline based free form geometry modelling approach. The geometry is defined by a number of features for the global shape and by Non-Uniform Rational B-splines (NURBS), via the use of control points for the local shape. The coordinates of the control points along with other dimensions are chosen as design variables. A knot insertion/removal process is introduced to increase flexibility and to obtain a compact definition of the final optimised shape. Here the geometry is modelled using an intelligent CAD system (ICAD), which enables complete automation of the design-to-analysis process. Stresses are obtained from finite element analysis. A two-stage hybrid strategy is used to solve the formulated optimisation problem. Its application to the design of a turbine disc firtree root is demonstrated. This new approach is compared to a more traditional optimisation analysis using ageometry model based on straight-lines and circular arcs. Improvements in the objective function and flexibility in geometry definition are achieved compared to designs obtained using the traditional approach.
Text
song_02.pdf
- Accepted Manuscript
More information
Published date: 2002
Additional Information:
AIAA 2002-5486
Venue - Dates:
9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, Atlanta, Georgia, 2002-09-04 - 2002-09-06
Identifiers
Local EPrints ID: 22798
URI: http://eprints.soton.ac.uk/id/eprint/22798
PURE UUID: 5a0b5a67-c8cb-4e0b-a10e-1aaaf98e047b
Catalogue record
Date deposited: 07 Mar 2007
Last modified: 16 Mar 2024 02:53
Export record
Contributors
Author:
Wenbin Song
Author:
Janet Rees
Author:
Steven Bagnall
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
