关键词: 创新设计, 遗传算法, 产品外型, 同类型产品, 非均匀有理B样条

Abstract: To effectively conduct creative design on surface of products through parameters, a new method combining Non-Uniform Rational B-Spline (NURBS) with Genetic Algorithm (GA) was presented. At first, concept of similar-type product was defined, a new surface representation based on NURBS theories was proposed to represent surfaces of similar-type products uniformly. Then, the constraints of surfaces were divided as absolute-constraints and relative-constraints, which represented necessary geometric constraints and customers′ requirements respectively. By applying GA as evolution process, a realization algorithm for creative design on surface of products was obtained. An example was used to illustrate the effectiveness of the proposed method. Result indicated that this method could conduct creative design on surfaces of products rapidly effectively.

Key words: creative design, genetic algorithm, surface of products, similar-type products, non-uniform rational B-spline