透镜式薄壁管状空间伸展臂压扁拉扁数值模拟与试验

薄壁管状空间伸展臂是一类基本空间展开折叠结构,具有广泛的应用和研究价值.首先分析了透镜型薄壁管压扁和拉扁机理,给出压扁、拉扁过程数值分析方法,分析了拉扁和压扁过程应力、应变和载荷-位移变化规律,进行了薄壁管拉扁和压扁过程试验,对比分析试验测试结果与计算分析结果,验证模拟分析方法,证明拉扁和压扁为大位移小应变过程.同时,拉扁和压扁过程中薄壁管段应力、应变及载荷-位移都有相似变化规律,反映了薄壁管段的相似特性.

Numerical Simulation and Flattening Tests of Compression and Pulling of Lenticular Thin Walled Tubular Space Booms

Abstract： Space mast is one of the basic deployable space structures which is widely used and studied. First, the work mechanism of compression and pulling flattening of thin walled tube was analyzed. Then, a numerical simulation method was proposed, and a comparative analysis was performed thoroughly of the structural behavior, including the stress, strain, and load displacement variation. After that, the test of thin walled tube flattening by compression and pulling were conducted, and the test results were verified with numerical simulation. Finally, the detailed test results were presented, such as strain, tip displacement, and a numerical simulation was performed for the test. The results indicate that the numerical simulation is effective and correct. Large displacement with small strain appears in flattening. Meanwhile, the stress, strain and load displacement vary similarly in flattening by compression and pulling. This paper is valuable for the optimization design of lenticular thin walled tube．