月壤填充式折展舱壁仿生结构拓扑优化研究  

Bio-inspired topological optimization of lunar regolith stiffened deployable capsule based on in-situ resource utilization

作　　者：徐钊 肖立平 王守一 赵海峰 XU Zhao;XIAO Liping;WANG Shouyi;ZHAO Haifeng(School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Space Utilization,Technology and Engineering Center for Space Utilization,Chinese Academy of Sciences,Beijing 100094,China)

机构地区：[1]中国科学院大学航空宇航学院,北京100049 [2]中国科学院空间应用工程与技术中心太空应用重点实验室,北京100094

出　　处：《华中科技大学学报（自然科学版）》2024年第8期41-47,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中国科学院科技创新项目(JCPYJJ-22002)。

摘　　要：为提高大型空间结构建造效率、降低发射成本,基于月壤填充加固理念提出一种树叶仿生式折展舱结构及相应的拓扑优化设计方法,实现可折展太空舱的加筋构型优化.参考树叶的叶脉分布原理进行仿生流线型加筋构型设计,利用月壤对折展舱板壳内部进行填充,实现加筋强化.基于Mohr-Coulomb本构模型拟合月壤材料的力学参数,以结构刚度、稳定性及质量为优化变量,构建折展舱面板结构的多目标优化模型并进行求解.分析结果表明:在月球重力作用下,舱体折展比约为5.7,结构应变能、自然频率与总质量之间通过多目标优化实现综合性能最优构型设计.对于应变能与自然频率的加权总目标,当权重0≤w≤0.08时,40%月壤体积分数结构最优,当0.08<w≤1.00时,30%月壤体积分数结构最优.除保证舱体折展比外,该设计在月壤资源利用、刚度、稳定性等方面也具有综合优势.研究结果验证了月壤填充式折展舱拓扑优化设计的可行性,为后续地外行星基地的建设提供了一种新的设计思路与建造方法.In order to improve the construction efficiency of large-scale space structures and reduce launch costs,a leaf biomimetic folding module structure and corresponding topology optimization design method based on the concept of lunar soil filling reinforcement were proposed to achieve the reinforcement configuration optimization of the folding module.This method,founded on the idea of utilizing lunar soil on-site,focuses on optimizing the internal structure of the foldable capsule using regolith channels.Within this research,a bionic linear reinforcement configuration,inspired by leaf vein distribution principles,was developed.Lunar soil was employed to bolster the interior of the folding hatch shell,resulting in enhanced reinforcement.A set of parameters based on Mohr-Coulomb model for lunar soil material was established,and a multi-objective optimization model was constructed and solved,with structural stiffness,stability,and mass as optimization parameters.The results demonstrate that under the effect of lunar gravity,the folding ratio of the cabin body is about 5.7,and the structure's strain energy,natural frequency,and total mass can be optimized through multi-objective optimization to achieve an optimal configuration design with comprehensive performance advantages in the utilization of lunar soil resources,stiffness,and stability.For the total weighted target of strain energy and natural frequency,when the strain energy's weight 0≤w≤0.08,the 40%lunar soil volume fraction structure is the optimal design,and when 0.08<w≤1.00,the 30%volume fraction structure is the optimal design.In addition to ensuring the space capsule's folding ratio,the feasibility of the topologycal optimization design for lunar soil-filled depolyable modules has been confirmed by the research results,providing a new design concept and construction approach for future exoplanet base projects.

关 键 词：月壤填充 折展结构 拓扑优化 仿生式设计 薄壁加筋结构 原位资源利用 

分 类 号：V11[航空宇航科学与技术—人机与环境工程]