摘要
月球天梯的构型对其力学特性和质量特性起决定性作用,直接关系到天梯建造材料的选取。目前对月球天梯的研究集中在组合横截面积构型上,未对其他构型天梯的特性展开深入研究。针对这一问题,文章进行了不同构型月球天梯的力学特性研究。建立了月球天梯动力学模型,分别将天梯缆绳线密度和应力作为常值,推导了等横截面积和变横截面积两种新构型月球天梯的动力学方程和质量特性方程,进行了不同构型天梯关键特性参数的计算和对比分析。研究结果表明,变横截面积天梯可将最大应力设计为任意恒定值,降低了对材料极限应力的要求,其总质量小于等横截面积和组合横截面积天梯,为最优构型方案。
The mechanical and mass characteristics are determined by the structure of lunar space elevator. Most of current researches about lunar space elevators only focus on combined-cross-section structure. Various structures of lunar space elevators were investigated.To analyze the mechanical and mass characteristics,the dynamic model of the space elevator was established.By supposing the density and stress as constant respectively,two different kinds of lunar space elevators called fixed-cross-section structure and taperedcross-section structure were obtained and compared.The results show that the maximum stress of tapered-cross-section structure can be designed as any constant value, which reduces the requirement of margin stress of the material.As a result,tapered-cross-section structure also has the least mass,which could be considered as the optimal choice.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2016年第3期63-69,共7页
Chinese Space Science and Technology
关键词
月球天梯
力学特性
质量特性
组合横截面积
等横截面积
变横截面积
拉格朗日点
lunar space elevator
mechanical characteristics
mass characteristics
combined-cross-section
fixed-cross-section structure
tapered-cross-section
Lagrangian point
