摘要
为促进空间网架结构的参数化建模应用与推广,基于YJK-GAMA提出网架结构的参数化建模基本流程,建立正放四角锥网架的参数化模型,并从杆件抽空、杆件重构、点阵空间重构3个角度分析网架结构参数化模型的二次利用,给出对应的编程操作方法.结果表明:网架参数化建模的流程基本相同,关键在于腹杆的创建;通过等差分步提取和删除杆件轴线可将正放四角锥网架改为正放抽空四角锥网架,通过等差分步提取上下弦节点重构腹杆,可将正放四角锥网架改为两向正交正放网架;通过点阵空间坐标调整可实现球面、椭圆柱面网壳参数化找形;基于YJK-GAMA的网架结构参数化模型具有较好的二次利用性能.
In order to promote the application and promotion of the parametric modeling of spatial grid structure,the basic process of parametric modeling of spatial grid structure was proposed based on YJK-GAMA,and the parametric model of orthographic quadrangle grid structure was established.Then the secondary utilization of the parametric model of spatial grid structure was analyzed from the perspectives of bar extraction,bar reconstruction and lattice space reconstruction,and the corresponding programming operation method was given.The results show that the process of parametric modeling is basically the same,and the key lies in the creation of belly bar.By extracting and deleting the axes of the rods step by step,the square pyramid space truss structure can be changed to square pyramid space truss structure with normally placed partial members omitted,and by extracting the upper and lower chord nodes step by step to reconstruct the belly bar,the square pyramid space truss structure can be changed to two orthogonal spatial truss structures.The parametric form-finding of spherical reticulated shell and elliptic cylindrical reticulated shell can be realized by adjusting lattice space coordinates.The parametric model of grid structure based on YJK-GAMA has better performance of secondary utilization.
作者
翁柳青
张景杭
WENG Liu-qing;ZHANG Jing-hang(College of Civil and Architecture Engineering,Liming Vocational University,Quanzhou 362000,Fujian,China)
出处
《兰州文理学院学报（自然科学版）》
2024年第5期84-88,共5页
Journal of Lanzhou University of Arts and Science(Natural Sciences)
基金
福建省教育厅中青年教师教育科研项目(JAT201298,JAT220706)
黎明职业大学校级一般课题(LZ202202,LZ2019116)
黎明职业大学科研团队项目(LMTD202004)
黎明职业大学博士启动基金(LZB202301)。
