Two numerical algorithms for optimizing the aerodynamic properties of road vehicles are presented. The first algorithm is based on a priori exploration of the design space, construction of response surfaces for the design objectives and minimizing them. This algorithm was applied in the present work to improve the crosswind stability of a bus. The second algorithm is fully automatic and starts with two initial designs that are then changed by the design algorithm during the design process. This modification of the original design is done by SIMPLEX, which is an algorithm for nonlinear optimization problems, while the resulting change of the design variables during the design process is achieved with morphing of computational grids. Only the initial results for optimization of a passenger car using this automatic algorithm are presented. Both methods are found to be promising for the optimization of the aerodynamic properties of vehicles.
Shape optimization of a bus for crosswind stability
Formoptimierung eines Omnibusses zur Erzielung von Seitenwindstabilität
2009
12 Seiten, 12 Bilder, 12 Quellen
Conference paper
English
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