Title page for ETD etd-06062008-165715
|Type of Document
||Hutchison, Matthew Gerry
||Multidisciplinary optimization of high-speed civil transport configurations using variable-complexity modeling
|Grossman, Bernard M.
|Haftka, Raphael T.
|Lutze, Frederick H. Jr.
|Mason, William H.
|Walters, Robert W.
|Date of Defense
An approach to aerodynamic configuration optimization is presented for the
high-speed civil transport (HSCT). Methods to parameterize the wing shape, fuselage
shape and nacelle placement are described. Variable-complexity design strategies
are used to combine conceptual and preliminary-level design approaches, both
to preserve interdisciplinary design influences and to reduce computational expense.
The preliminary-design-level analysis methods used to estimate aircraft performance
are described. Conceptual-design-level (approximate) methods are used to estimate
aircraft weight, supersonic wave drag and drag due to lift, and landing angle of
attack. The methodology is applied to the minimization of the gross weight of an
HSCT that flies at Mach 2.4 with a range of 5500 n.mi. Results are presented for
wing plan form shape optimization and for combined wing and fuselage optimization
with nacelle placement. Case studies include both all-metal wings and advanced
composite wings. The results indicate the beneficial effect of simultaneous design
of an entire configuration over the optimization of the wing alone and illustrate the
capability of the optimization procedure.
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