Abstract: In order to solve the problem of product design under constraints, a product innovative design model based on constraint network was established under the guidance of complex network theory and graph theory. Firstly, relevant factors were selected from the design constraint database as constraint variables to construct the design constraint network. Secondly, the centrality indexes of constraint network were calculated through dual graph to achieve the rank of node importance, and then the problem of design constraints were summed up and solved. Finally, a constraint-based evolutionary design system of product was established. By analyzing of constructed network, taking luminous jade cup as an example, key nodes were obtained, and concrete problems of design constraints were summed up. The methods such as dynamic simulation and interval constraint of control points were used to solve these problems. An evolutionary design system for luminous jade cup was developed, the form evolution was carried out on the representative samples of traditional luminous cup, and a series of design schemes satisfying the constraint conditions were generated. The results show that product design under the guidance of constraint network could be effectively realized.

Key words: product design, design constraints, complex network, dual graph, evolutionary design