Knowledge-Based Free Mesh Generation of Quadrilateral Elements in Two-Dimensional Domains

Abstract: A knowledge-based system, FREEMESH, for free mesh generation of quadrilateral elements in general two-dimensional structures, is introduced in this paper. Based on the recursive logic, a plane domain is firstly represented with boundary features, corresponding to which a group of heuristic rules is built up to generate quadrilaterals recursively. The niles include the initial design rules and the redesign rules. To facilitate the rule-based inference, the geometric reasoning is turned to acquire domain boundary features. Examples show that this strategy is effective.