21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-7.2.3

MULTIDISCIPLINARY DESIGN ANALYSIS AND OPTIMISATION OF AEROSPACE VEHICLES: INCORPORATION OF MANUFACTURING INFORMATION

Gantois K.
Cranfield University, United Kingdom

Keywords: design, optimization, aerospace vehicles, manufacturing

The Paper describes a metal and composite recurrent cost model of a large civil aircraft wing structure for a multidisciplinary design, analysis and optimisation (MDO) environment. The work was part of a recent European MDO project (BE95-2056) which investigated methods for the integration of structures, aerodynamics, dynamics and manufacturing cost at the preliminary design stage. The paper discusses the cost modelling approach, which is based on parametric and process cost model methods, and the integration of the cost .models into an MDO process. Several methods to integrate the manufacturing cost into the Direct Operating Cost (DOC) were investigated. Results for the cost models and DOC optimisation are shown. A framework has been successfully developed which allows the incorporation of manufacturing cost models into an MDO environment. It allows a designer to evaluate cost changes with respect to specific design changes such as rib pitch, stringer pitch, wing area and wing sweep.

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