基于三角形折叠的牵引变电所BIM模型几何轻量化

Geometric Lightweight of BIM Model of Traction Substation Based on Triangle Folding

针对牵引变电所中设备体积大、结构复杂、特征曲面较多而导致BIM模型数量级大、三角面数量和点数量多等问题,改进二次误差测度算法.基于牵引变电所设备特征,在误差矩阵计算中加入邻接三角形平均面积、多邻域曲率和顶点重要度,按照折叠误差确定新三角形网格顶点,构建轻量化模型.结果表明,轻量化BIM模型可完整保持边界和细节特征,并提高计算精度与效率.

Aiming at the problems of large size of equipment,complex structure,the large magnitude BIM model order caused by the diverse characteristic surfaces in traction substations,the great number of triangles and the number of points,etc.a quadratic error measurement algorithm is improved.Based on the equipment characteristics of the traction substation,the average area of adjacent triangles,multi neighborhood curvature and vertex importance are added to the error matrix calculation,while the new triangle mesh vertices are determined according to the folding error to construct a lightweight model.The results show that the lightweight BIM model can completely maintain the boundary and detailed features,and improve the calculation accuracy and efficiency.