【摘要】 为实现高刚轻质的桁架结构，提出了一种基于植物分支系统生长机理的空间桁架结构优化设计方法。通过模拟植物在自然环境中的生长、分支和退化过程，使空间桁架结构能够根据载荷和边界条件自适应地进行生长，直接获得桁架结构分布和型材尺寸信息。对典型空间桁架结构中的简支梁型桁架、悬臂梁型桁架及L型桁架结构分别在弯曲工况和扭转工况下进行了设计讨论。结果表明，设计方法能够快速收敛到最优结构布局，不受基结构网格密度影响。进一步对工程应用实例扶梯桁架进行设计验证，优化后的扶梯桁架提高了刚度，减轻了重量，实现了高刚轻质的设计目标，表明设计方法具有较好的工程应用潜力。更多还原

【Abstract】 To obtain high stiffness and lightweight truss structures, a space truss structure optimization design method based on the branching growth mechanism of plants was proposed. By simulating the growth, branching, and degeneration processes of plants in natural environments, the space truss structure can adaptively grow based on load and boundary conditions, directly obtaining information on truss distribution and profile dimensions. Design discussions were conducted on the typical space truss structure, including simply supported beam-type truss, cantilever beam-type truss, and L-shaped truss under bending and torsion conditions. The results demonstrate that the design method converges quickly to the optimal structural layout, unaffected by the base structure’s mesh density. Further design validation was carried out on a practical example of an escalator truss. The optimized escalator truss improved stiffness, reduced weight, and achieved the design goal of high stiffness and lightweight,indicating the method’s strong potential for engineering applications.更多还原