文档介绍：C-40-1
MULTIDISCIPLINARY OPTIMIZATION METHODS
FOR PRELIMINARY DESIGN
J. J. Korte, R. P. Weston, and T. A. Zang
Multidisciplinary Optimization Branch, MS 159
NASA Langley Research Center
Hampton, VA 23681-0001 USA
SUMMARY the disciplines. Typical figures of merit for evaluating
An overview of multidisciplinary optimization (MDO) the relative importance of design parameters on the
methodology and two applications of this methodology conceptual vehicle design are system performance and
to the preliminary design phase are presented. These system cost.
applications are being undertaken to improve, develop, Geometry
validate and demonstrate MDO methods. Each is
presented to illustrate different aspects of this Aerodynamics Lofting Tools Propulsion
methodology. The first application is an MDO Vortex-Lattice Engine Deck
preliminary design problem for defining the geometry
and structure of an aerospike nozzle of a linear aerospike
rocket engine. The second application demonstrates the Controls Performance Materials
use of the Framework for Interdisciplinary Design
Full Mission Database
Optimization (FIDO), which is putational + All
environment system, by solving a preliminary design Constraints
problem for a High-Speed Civil Transport (HSCT).
The two sample problems illustrate the advantages to Structures Weights
performing preliminary design with an MDO