Abstract
Based on an idealized computational model of the aircraft, the computer-augmented preliminary design procedure (CAPDA) for commercial aircraft design and optimization has been developed. Contrary to the sophisticated approach of existing complex CAD systems, which consider structural and aerodynamic aspects in more detail and even lead to a CAM interface, in the system presented here the configurational development is emphasized, with special focus on parametric studies and optimization. The iterative synthesis that is established on a corresponding analysis level and uses input data from an extensive statistical data bank results in a numerical representation of geometry and performance. For the development of an optimized baseline configuration, an optimization module based on a direct search strategy can be applied. The capabilities of the program system are demonstrated in several design examples.
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