建筑结构学报2024，Vol.45Issue(10)：170-180,11.DOI:10.14006/j.jzjgxb.2023.0546
考虑铸造约束的空间结构节点拓扑优化设计研究
Topology optimization design of spatial structural nodes considering casting constraint
摘要
Abstract
Aiming at the design problem of high-performance spatial structural nodes considering castability for industrialized batch production,a continuum topology optimization method integrating casting constraint was introduced to conduct the concept design of typical spatial structural nodes.An optimization model for minimizing the strain energy of the nodal domain(equivalent to maximizing nodal stiffness)was established under multi-loading conditions,which simultaneously considers casting and material volume constraints.To improve the design performance,threshold projection technology was used to suppress the generation of a large number of intermediate-density elements caused by density filtering.The optimization program was implemented through MATLAB.Comparative research was conducted on the topology optimization of spatial structural nodes with or without casting constraint,using the classic 3D four-ear plate spatial structural node as the design object.And the effects of different filtering radii,loading conditions,material volume,and meshes on the optimized design were evaluated.The results show that the traditional optimization method cannot ensure the castability of the optimized design of spatial structural nodes,and the casting constraint consideration is a necessary and feasible method to solve this problem.Reducing the filtering radius and increasing the amount of material will help enhance the design stiffness of the optimized nodes.Refining the finite element mesh can improve the design quality of nodes,but it will significantly increase computational costs.关键词
空间结构/节点/拓扑优化/铸造约束/可制造性设计Key words
spatial structure/structural node/topology optimization/casting constraint/design for manufacturing分类
建筑与水利引用本文复制引用
韩文哲,王超,杜文风,余永强,徐斌..考虑铸造约束的空间结构节点拓扑优化设计研究[J].建筑结构学报,2024,45(10):170-180,11.基金项目
国家自然科学基金项目(12372124),中国博士后科学基金资助项目(2023T160189),河南省高等学校重点科研项目(24A130001),中建股份重点研发课题(CSCEC-2020-Z-4). （12372124）
