Aerospace design optimization typically explores the effects of structural performance and aerodynamics on the geometry of a component. This paper presents a methodology to incorporate manufacturing cost and fatigue life models within an integrated system to simultaneously trade off the conflicting objectives of minimum weight and manufacturing cost while satisfying constraints placed by structural performance and fatigue. A case study involving the design of a high pressure turbine disk from an aircraft engine is presented. Manufacturing cost and fatigue life models are developed in DECISIONPRO™, a generic modeling tool, whereas finite element analysis is carried out in the Rolls-Royce PLC proprietary solver SC03. A multiobjective optimization approach based on the nondominated sorting genetic algorithm (NSGA) is used to evaluate the Pareto front for minimum cost and volume designs. A sequential workflow of the different models embedded within a scripting environment developed in MATLAB™ is used for automating the entire process.

1.
Scanlan
,
J.
,
Rao
,
A.
,
Bru
,
C.
,
Hale
,
P.
, and
Marsh
,
R.
, 2006, “
The DATUM Project: A Cost Estimating Environment for the Support of Aerospace Design Decision Making
,”
Struct. Optim.
0934-4373,
43
(
4
), pp.
1022
1028
.
2.
Sobieszczanski-Sobieski
,
J.
, and
Haftka
,
R. T.
, 1997, “
Multidisciplinary Aerospace Design Optimisation: Survey of Recent Developments
,”
Struct. Optim.
0934-4373,
14
(
1
), pp.
1
23
.
3.
Bao
,
H. P.
, and
Samareh
,
J. A.
, 2000, “
Affordable Design: A Methodology to Implement Process-Based Manufacturing Cost Models Into Traditional Performance Focused Multidisciplinary Design Optimisation
,”
Eighth AIAA/USAF/NASA/ISSMO Symposium on Multidisciplinary Analysis and Optimization
,
Long Beach, CA
, Paper No. AIAA-2000-4839.
4.
C.
Rush
and
R.
Roy
2000, “
Analysis of Cost Estimating Processes Used Within a Concurrent Engineering Environment Throughout a Product Life Cycle
,”
Seventh ISPE International Conference on Concurrent Engineering: Research and Applications
,
Lyon, France
, Technomic Inc., PA, pp.
58
67
.
5.
Scanlan
,
J.
,
Hill
,
T.
,
Marsh
,
R.
,
Bru
,
C.
,
Dunkley
,
M.
, and
Cleevely
,
P.
, 2002, “
Cost Modelling for Aircraft Design Optimization
,”
J. Eng. Design
0954-4828,
13
(
3
), pp.
261
269
.
6.
Rao
,
A. R.
,
Scanlan
,
J. P.
, and
Keane
,
A. J.
, 2005, “
A Cost Based Methodology for Design Optimization
,”
ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
,
Long Beach, CA
, Paper No. DETC2005-84685.
7.
Wagner
,
S.
, 2004, “
Evolution of Trent HP Turbine Rotor Disk Based on the Trent 900 HPT Rotor
,” Turbine Systems Engineering, Rolls-Royce PLC, Derby, UK.
8.
Keane
,
A. J.
, 2003, “
The OPTIONS Design Exploration System: Reference Manual and User Guide
,” University of Southampton, UK.
9.
Fonseca
,
C.
, and
Fleming
,
P.
, 1995, “
An Overview of Evolutionary Algorithms in Multiobjective Optimization
,”
Evol. Comput.
1063-6560,
3
(
1
), pp.
1
16
.
10.
Deb
,
K.
,
Pratap
,
A.
,
Agrawal
,
S.
, and
Meyarivan
,
T.
, 2002, “
A Fast and Elitist Multiobjective Genetic Algorithm: NSGA-II
,”
IEEE Trans. Evol. Comput.
1089-778X,
6
, pp.
182
197
.
11.
Das
,
I.
, and
Dennis
,
J.
, 1997, “
A Closer Look at the Drawbacks of Minimizing Weighted Sum of Objectives for Pareto Set Generation in Multicriteria Optimization Problems
,”
Struct. Optim.
0934-4373,
14
, pp.
63
69
.
12.
Voutchkov
,
I. I.
, and
Keane
,
A. J.
, 2006, “
Multiobjective Optimization Using Surrogates
,”
Seventh International Conference in Adaptive Computing in Design and Manufacture
,
Bristol, UK
, pp.
167
175
.
13.
Scanlan
,
J. P.
, 2004, “
DATUM (Design Analysis Tool for Unit Cost Modeling): A Tool for Unit Cost Estimation of Gas Turbine Design Within Rolls-Royce
,”
Cost Eng.
0274-9696,
42
(
6
), pp.
8
10
.
14.
Keane
,
A. J.
, and
Nair
,
P.
, 2005,
Computational Approaches for Aerospace Design: The Pursuit of Excellence
,
Wiley
,
Chichester, UK
.
15.
Song
,
W.
, 2002, “
Shape Optimisation of Turbine Blade Firtrees
,” Ph.D. thesis, School of Engineering Sciences, University of Southampton, Southampton, UK.
16.
Suresh
,
S.
, 1998,
Fatigue of Materials
,
Cambridge University Press
,
Cambridge, England
.
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