蒙皮点阵一体化支撑结构的移动可变形组件优化设计及空间站应用  

Optimal Design of Shell-lattice Infill Integrated Supporting Structure Based on the Method of Moving Morphable Components and Its Application in China Space Station

作　　者：张啸雨[1] 刘畅 施丽铭[1] 蒋旭东 曾惠忠[1] 周浩[1] 郭旭[2] Xiaoyu Zhang;Chang Liu;Liming Shi;Xudong Jiang;Huizhong Zeng;Hao Zhou;Xu Guo(Beijing Institute of Spacecraft System Engineering,Beijing,100094;Department of Engineering Mechanics,Dalian University of Technology,Dalian,116023)

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]大连理工大学工程力学系,大连116023

出　　处：《固体力学学报》2022年第5期551-563,共13页Chinese Journal of Solid Mechanics

基　　金：国家重点研发计划项目(2020YFB1709400);国家自然科学基金项目(12172041,11821202,11732004,12002077);中国科协青年人才托举工程项目(2017QNRC001);辽宁省自然科学基金项目(2021-BS-063)资助。

摘　　要：中国空间站是我国研制的系统最为复杂的载人航天器,其中有效载荷支撑结构的高效轻量化设计是工程研制过程中遇到的技术难题.论文介绍了受晶体对称性启发的增材制造自支撑三维点阵结构设计方法,发展了基于蒙皮点阵一体化结构形式的移动可变形组件(MMC)拓扑优化方法,完成了面向增材制造的中国空间站某相机支撑结构的优化设计,该结构采用激光选区熔化成形(SLM)工艺制造,通过了力学试验考核,实现结构减重50%,基频提高35%,完成了基于MMC方法的蒙皮点阵一体化结构在我国载人航天领域的首次型号应用与在轨验证.The China Space Station is the most complex manned spacecraft developed by China, in which the efficient and lightweight design of payload supporting structure was a technical challenge encountered during the engineering development process. In order to reduce the weight of the supporting structure as much as possible while ensuring the service performance, an additive manufactured shell-lattice infill integrated structure was selected as its structural form, and its lightweight design was realized through topology optimization techniques. This paper summarizes the design method of self-supporting lattice structure inspired by crystal symmetry for additive manufacturing, and develops an optimization design approach of shell-lattice infill integrated supporting structure based on the method of moving morphable components(MMC). Taking advantage of the MMC-based method with explicit structural geometric parameters and the ability to obtain clear optimal force transfer paths, the mathematical formulation for additive manufacturing-oriented shell-lattice infill integrated topology optimization was proposed, with the fundamental structural frequency as the constraint and the lightest weight as the optimization objective. After the optimization process, the additive manufacturing model was reconstructed by the non-uniform rational B-spline(NURBS) surface based on the optimal structural force transfer path and the information of structural feature sizes on this path, which was finally fabricated by the selective laser melting(SLM) process. In order to verify the effectiveness of the design, the supporting structure and the simulated parts for equipment mass were verified by single-machine vibration tests. The experimental results showed that the weight of the supporting structure was reduced by 50%, and the fundamental frequency was increased by 35% through the MMC-based topology optimization design. At present, the supporting structure has been successfully launched with the China Space Station, and the relevant equipme

关 键 词：蒙皮点阵一体化结构 自支撑三维点阵 移动可变形组件方法 拓扑优化 增材制造 中国空间站 

分 类 号：V476.1[航空宇航科学与技术—飞行器设计]