考虑材料厚度的空间充气舱柔性防护结构折叠方案设计

Folding Pattern Design of Flexible Protective Structures of Space Inflatable Habitat Considering Material Thickness

充气式太空舱可应用于建设载人空间站,但是其柔性防护结构的折叠方案设计方法很少被研究。文章基于非线性有限元法分析了层合薄膜材料中各单层薄膜的折叠过程,得到折叠应力/应变和折叠角度之间的关系曲线;建立了柔性防护结构折叠性能分析模型,得到了柔性防护结构的最小折叠半径和折叠应力分布等。针对类似于毕格罗可充气活动模块(Bigelow Expandable Activity Module,BEAM)的空间充气舱柔性防护结构,采用波纹管折叠样式设计了折叠方案,并评估了体积折叠率。柔性防护结构的折叠方案设计可以为未来空间充气舱的研制和应用提供支撑。

Inflatable space habitat can be applied in the construction of manned space station,but the folding pattern design method of its flexible protective structures is rarely researched.Based on the nonlinear finite element method,the folding process of each single membrane in laminated membrane materials is analyzed.The relation curves of folding stress/strain and folding angle are obtained.The folding performances analysis model of the flexible protective structure is established.The minimum folding radius and folding stress of the flexible protective structure are obtained.For the flexible protective structure of a space inflatable habitat which is similar to Bigelow Expandable Activity Module(BEAM),the folding pattern is designed based on bellows folding pattern,and the volume folding rate is evaluated.Folding pattern design of flexible protective structures provides support for the future development and application of space inflatable habitat.