Type of Document	Dissertation
Author	Hutchison, Matthew Gerry
URN	etd-06062008-165715
Title	Multidisciplinary optimization of high-speed civil transport configurations using variable-complexity modeling
Degree	PhD
Department	Aerospace Engineering
Advisory Committee	Advisor Name Title Grossman, Bernard M. Committee Chair Haftka, Raphael T. Committee Member Lutze, Frederick H. Jr. Committee Member Mason, William H. Committee Member Walters, Robert W. Committee Member
Keywords	High-speed aeronautics
Date of Defense	1993-03-14
Availability	restricted
Abstract 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.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access  LD5655.V856_1993.H883.pdf 5.86 Mb 00:27:09 00:13:57 00:12:13 00:06:06 00:00:31 next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

If you have questions or technical problems, please Contact DLA.