A Parametric Modeling Method and System for Bridge Components Based on Geometric Constraints

Abstract

This invention provides a parametric modeling method and system for bridge components based on geometric constraints, relating to the field of bridge modeling technology. The method includes obtaining the topological relationship matrix and geometric constraint set of bridge components; extracting the dominant direction through eigenvalue decomposition; dividing the main load-bearing component set into a set of auxiliary components; and establishing parameter-driven relationships. Constraints are classified into mandatory and flexible geometric constraints. A hierarchical parameter solution framework is adopted, first fixing the dominant topological direction of the main load-bearing components to satisfy the mandatory constraints, then solving for the parameter values ​​of the auxiliary components, and finally generating a complete BIM parametric model. This method significantly improves BIM modeling efficiency, optimizes the quality of design results, and realizes intelligent parameter-driven modeling of bridge components.

Images