This thesis presents new methodsand approaches to improve accuracy, efficiency, and flexibilityof... more This thesis presents new methodsand approaches to improve accuracy, efficiency, and flexibilityof data prediction of primary structuresduring preliminaryaircraft de¬ sign. Their applicabilityand usefulness is illustrated with the help of examples. The rapid developmentof Computing technology during the past years opened new opportunities of simulating physical processes in order to predict the response of Systems. The basis for several kinds of simulations is given by geometricalmod¬ eis. Simulationcodes like FiniteElementmethods or CFD solvers are integrated into strongly automated pre-design processeswith taking advantage of modern CAE Sys¬
Two new concepts for supporting CAD of repetitively stiffened structures are presented. The two c... more Two new concepts for supporting CAD of repetitively stiffened structures are presented. The two concepts are called D-operator and S-operator, respectively. They are illustrated by using sample aerospace structures but can be applied to any CAD structure. At the end of this paper, the results will be discussed and an outlook will give some ideas for further development and improvements of the method.
This thesis presents new methodsand approaches to improve accuracy, efficiency, and flexibilityof... more This thesis presents new methodsand approaches to improve accuracy, efficiency, and flexibilityof data prediction of primary structuresduring preliminaryaircraft de¬ sign. Their applicabilityand usefulness is illustrated with the help of examples. The rapid developmentof Computing technology during the past years opened new opportunities of simulating physical processes in order to predict the response of Systems. The basis for several kinds of simulations is given by geometricalmod¬ eis. Simulationcodes like FiniteElementmethods or CFD solvers are integrated into strongly automated pre-design processeswith taking advantage of modern CAE Sys¬
Two new concepts for supporting CAD of repetitively stiffened structures are presented. The two c... more Two new concepts for supporting CAD of repetitively stiffened structures are presented. The two concepts are called D-operator and S-operator, respectively. They are illustrated by using sample aerospace structures but can be applied to any CAD structure. At the end of this paper, the results will be discussed and an outlook will give some ideas for further development and improvements of the method.
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Papers by Christof Ledermann