空间桁架结构自适应成长优化设计

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中图分类号：TH122 文献标志码：A

Abstract： To obtain high stiffess 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.

Keywords： space truss; plant branching system; adaptive growth; structural optimization design; escalator truss

空间桁架结构由于良好的结构稳定性和承载能力使其在众多领域得到广泛应用，尤其是在需要大跨度支撑的场合，如厂房、体育馆、桥梁及商场扶梯等公共建筑。（剩余9026字）