APPLICATION OF THE VARIABLE-FIDELITY MDO TOOLS TO A JET AIRCRAFT DESIGN

摘要

A 5-year R&D project has been in progress in Japan toward the development of an environmentally friendly high performance small jet aircraft since 2003. We developed and applied a Multidisciplinary Design Optimization (MDO) tool to a wing design in the conceptual design phase where a block fuel optimization was performed through aero and structural optimization. To be used as a practical design tool, we have introduced a flexible airfoil representation method to ensure a sufficient design space, and an optimization acceleration method to obtain the optimum in the practical time. As a result, by applying the CAD based geometry representation method and the Variable-Fidelity method to our MDO tool, the expansion of the design space was achieved and the optimization time was reduced to 10%. These techniques were applied to an engine-airframe integration, which is one of the most important items of the airplane design.