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对工程设计中的建筑模型、结构模型以及结构力学分析模型之间的关系和采用边界表达技术描述的结构构件的空间拓扑关系进行分析,提炼与结构分析相关的构件几何关系。针对基于三维的建筑模型到结构模型转换过程中信息失真问题,结合空间直线段与三角形面片相交的数学推论,提出一种判断三维构件之间相交关系的简化算法,并基于此简化算法分别对线性和面类构件之间的相交节点进行归类和优化处理,并对各类构件之间相交节点定义优先权的程序算法进行设计。通过程序对简化算法和节点优化方法进行实例应用,结果表明,该方法有助于建筑结构模型转换中对基本构件信息正确地提取和定位,对促进工程设计中的协同工作具有一定的参考价值。
The relationship between the building model, structural model and structural mechanics analysis model in engineering design and the spatial topological relations of the structural elements described by the boundary expression technique are analyzed, and the geometric relationships of the structural elements related to the structural analysis are refined. Aiming at the problem of information distortion in the transformation from 3D building model to structural model, a simplified algorithm for judging the intersection of three-dimensional components is proposed based on the mathematical reasoning that the intersection of spatial straight line and triangle patch, and based on the simplified algorithm The intersection and intersection points between linear and surface components are classified and optimized, and the algorithm of the algorithm that defines the priority of the intersection nodes of all kinds of components is designed. The application of the simplified algorithm and the node optimization method are given through the program. The results show that this method is helpful to correctly extract and locate the information of the basic components in the transformation of the building structure model, and has certain reference value for promoting the collaborative work in engineering design.