A Coarse Grained Variable-Complexity Approach to MDO for HSCT Design

A parallel variable-complexity modeling approach, permitting the eecient use of emerging parallel computing in multidisciplinary optimization (MDO) technology, is presented for the particular instance of High Speed Civil Transport (HSCT) design. Simple analyses are used to limit the approximation domain in the design space. Points are selected within the approximation domain by a genetic algorithm based on the D-optimality criterion. At the selected points, a reened analysis is performed. The optimization code is composed of a sequence of analysis cycles between aerodynamic and structural calculations. A coarse grained parallelization of the aerodynamic code is presented.