温室穹顶结构大尺度网格优化研究

Research on Large-scale Grid Optimization of Greenhouse Dome Structure

某温室花园穹顶屋面曲率变化大、网格尺度大,原建筑方案网格尺寸大小不一,网格均匀性连续性较差。在原网格的基础上进行曲面重建,分别采用曲面参数域细分法、气泡法以及曲面近似展开贴面法对大面温室网格进行划分,采用自适应三角形网格推进法对连桥网格进行划分。结果表明:曲面细分法网格流畅性好,网格均匀性较差;气泡法网格均匀性较好,网格流畅性差,网格存在局部奇异点;基于曲面近似展开的贴面法网格,大面网格均匀性及流畅性均有明显改善,网格无奇异点,对于曲率变化较大的大尺度屋盖,可采用该方法进行网格划分。

A greenhouse garden dome roof has a large curvature change and a large grid size.The grid size of the original building scheme is different,and the grid uniformity and continuity are poor.On the basis of the original mesh,the surface is reconstructed,and the mesh is divided by the surface parameter domain subdivision method,the bubble method and the surface approximate expansion mapping method.The results show that the surface subdivision method has good mesh smoothness and poor mesh uniformity;The bubble method has better mesh uniformity,but poor fluency,and the mesh has local singular points;the mapping method based on the approximate expansion of the surface,the uniformity and fluency of the large surface mesh are significantly improved,and the mesh has no singular points.For large-scale roofs with large curvature changes,this method can be used for mesh division.