基于OptiStruct的空间节点轻量化设计

为实现空间节点减重和结构优化的目的，文中以矩形截面钢管节点为例，对传统钢管节点有限元分析，根据节点的应力分布规律以及破坏形式，使用拓扑优化方法，以节点总质量最小为设计目标，在保证节点结构强度和刚度的条件得到最终设计方案，优化后总质量减少38.9%。通过3D打印加工技术，实现传统制造方法所不能实现的复杂零件结构的制造，经过试验分析证明，优化后的节点在减轻了重量的同时性能更好。

Lightweight Design of Steel Tubular Joints Based on Optistruct

In order to achieve the purpose of weight reduction and Structure optimization of space joint. The rectangular steel tubular joint is studied as an example in this paper, based on the finite element analysis of the traditional rectangular steel tubular joints and according to the law of the stress distribution and failure mode of the joints,under the optimization topology methods, sets minimal mass of the joints as the target to obtain the final design under the condition of ensuring the sufficient strength and rigidity of the joints structure. The results of weight-reducing design show that the total weight is reduced by 38.9%.3D printing process technology is also implemented in order to realize the manufacture of complex components which cannot be produced with traditional manufacturing methods.