一种全封闭蒙皮点阵支撑结构的优化设计与试验验证

随着人类航天活动范围的不断扩大，复杂航天任务对于结构轻量化技术提出了更高的要求。在传统的结构形式基础上，单纯通过应用高性能材料等手段已经无法满足后续航天任务对于航天器载荷支撑结构轻量化的要求。提出一种封闭蒙皮包裹三维点阵层级结构的设备支撑结构形式，建立设备支撑结构的拓扑优化设计模型，并对优化后的结构进行封闭蒙皮包裹三维点阵化设计。运用激光选区熔化方法制备了支撑结构实物，并进行了振动力学试验验证，试验结果表明设备支撑结构比采用传统设计及制造方法的结构减重46.4%，实物已应用于某型号卫星载荷支撑任务。提出的封闭蒙皮包裹三维点阵的结构形式可以有效提高支架类结构的设计效率，在航天器结构轻量化方面具有推广应用前景。

Optimal Design and Experimental Verification of an Enclosed Skin Lattice Support Structure

With the continuous expansion of human space activities, complex missions have put forward higher requirements for structural lightweight technology. On the basis of traditional structure, the approach including the application of high-performance materials can hardly meet the requirement of lightweight structures. A new type of load support structure with an enclosed skin-wrapped three-dimensional lattice hierarchical structure is propsed, a topological optimization design model of the structure is established, and a design on the optimized structure is performed. The physical structure is prepared by the additive manufacturing method of selective laser melting (SLM), and the dynamic test verification is carried out. The results show that the optimal load support structure is 46.4% lighter than the traditional one. And it has already applied to a certain satellite load support mission. The proposed enclosed skin wrapped three-dimensional lattice structure can effectively improve the design efficiency of stent-like structures, and has the prospect of popularization and application in the lightweight of spacecraft structures.