钢结构网架屋面增材制造接头的拓扑优化设计与分析

Topology optimization design and analysis of joint made of steel structure grid roof by adding materials

设计了一套用于空间网架结构钢接头参数拓扑优化(TO)设计、数值分析和增材制造的计算机辅助工作流程。通过参数化有限元(FEA)分析,对优化节点的结构性能进行了研究。考虑了影响柔度、最大位移、最大应力和应力分布的不同变量和参数。分析表明,目标体积决定了节点的结构行为,而过滤半径影响优化节点的几何细节。通过一个具有数百个钢接头的双层空间网架结构参数化优化设计框架,验证了所提工作流程的实用性。该工作流程自动化程度高,设计灵活性和集成度高,移植能力强。

In this paper,a set of computer-aided workflows for parametric topology optimization design,numerical analysis and additive manufacturing of steel joints for space grid structures is presented.The structural performance of the optimized nodes is investigated through parametric finite element analysis.Different variables and parameters affecting flexibility,maximum displacement,maximum stress and stress distribution were considered.The analysis shows that the target volume determines the structural behavior of the node,while the filtration radius affects the geometrical details of the optimized node.The practicality of the proposed workflow is verified through a parametric optimization design framework for a two-story space grid structure with hundreds of steel joints.The workflow is highly automated,with high design flexibility and integration,and strong portability.