预应力下空间站柔性太阳翼动力学特性分析  

Dynamic characteristics of a space station's flexible solar array with prestress

作　　者：耿盛韦 王志瑾[1] 胡秋野 GENG Shengwei;WANG Zhijin;HU Qiuye(Ministerial Key Laboratory of Advanced Design Technology of Aircraft,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

机构地区：[1]南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016

出　　处：《航天器环境工程》2016年第5期490-496,共7页Spacecraft Environment Engineering

基　　金：江苏高校优势学科建设工程基金资助项目

摘　　要：空间站柔性太阳翼上有以下预应力:1)在轨工作时,会周期性进出地球阴影区,结构温度会发生周期性的变化,温差在结构上产生了热应力;2)中央桁架斜拉杆上作用有展开预应力;3)柔性阵面上施加有张紧力。这些预应力都会引起几何刚度,从而改变太阳翼结构的动力学特性。文章使用Abaqus非线性动力学求解功能,首先对中央桁架部分和柔性阵面部分分别建立有限元模型,研究预应力对太阳翼动力学特性的影响,发现只有柔性阵面上的张紧力影响最为显著;然后针对完整的太阳翼结构,考虑阵面张紧力作用下,研究其动力学特性,并与未考虑预应力引起的刚度变化时的结构动力学特性进行对比分析。The flexible solar array (FSA) of a space station has the following kinds of prestresses: (1) the thermalstress caused by periodically varying temperature field in the central truss; (2) the deployment stress in the oblique rodof the central truss; (3) pretension in the flexible solar blanket. These kinds of prestresses will affect the geometric stiffnessand change the dynamic characteristics of the FSA. The Abaqus nonlinear dynamic solver is used in this paper.First of all, the central truss and the flexible solar blankets are modeled separately to analyze the effect of the prestress.Results show that the pretension in the flexible solar blanket plays a major role in affecting the dynamic characteristics.Then, the whole model of the FSA is built to analyze its dynamic characteristics in consideration of the pretension. Finally,a comparison is made between the results with and without the prestress.

关 键 词：太阳翼 挠性结构 几何刚度 动力学特性 有限元方法 

分 类 号：V414.3[航空宇航科学与技术—航空宇航推进理论与工程]