计算机辅助空间结构节点智能优化设计与3D打印OA北大核心CSTPCD

To deal with the issue of low degree of parameterization for the topology optimization-3D printing design and manufacturing of spatial structure joints,a complete workflow of computer-aided design(CAD),computer-aided engineering(CAE),and computer-aided manufacturing(CAM)was proposed for the design,numerical analysis and 3D printing fabrication of topology optimized steel joints in spatial structures.An integrated parametric CAD topology optimization framework for joints in spatial structures was established based on the Grasshopper platform to intelligently generate the optimized joints.The topology optimized joints were numerically studied through the Abaqus/CAE platform.The 3D printing design,simulation and manufacturing command were completed by the CAM module embedded in Fusion 360 platform.Two design examples of steel joints in a single-layer gridshell structure and a double-layer spatial grid structure were presented to demonstrate the applicability of the proposed workflow.The results show that compared to the traditional joint types,the novel generated joints have more aesthetic architectural appearance and superior structural performance with lighter weight.The optimized joint with only 40％-60％weight of the traditional hollow spherical joint counterpart exhibits better structural performance in terms of the compliance,maximum displacement and maximum stress.The precision manufacturing of such optimized high-performance joints could be achieved by selective laser melting technology using 316L stainless steel powder.