盘绕式伸展臂纵杆变形分析研究  

Study on Longeron Deformation Analysis of a Coilable Mast

作　　者：马海波 穆育强 黄海[2] 赵旭瑞 MA Haibo;MU Yuqiang;HUANG Hai;ZHAO Xurui(Aerospace Science and Technology Space Engineering Development Co.,Ltd.,Beijing 100854,China;School of Astronautics,Beihang University,Beijing 100191,China)

机构地区：[1]航天科工空间工程发展有限公司,北京100854 [2]北京航空航天大学宇航学院,北京100191

出　　处：《西北工业大学学报》2020年第S01期35-43,共9页Journal of Northwestern Polytechnical University

摘　　要：介绍了一种纵杆变形分析的数值方法,用作盘绕式伸展臂逐层展开过程中的变形研究。该数值方法基于已有的弹性细杆变形分析理论,将伸展臂纵杆离散成一系列圆柱面约束条件下的短杆,分别对临界状态下的短杆进行边界条件确定和变形分析,进而运用迭代方法求得纵杆变形。针对在研伸展臂模型,分别进行微重力展开实验和根部展开动力学仿真,并将二者结果与数值计算结果进行对比,考察该数值方法的可行性和有效性。结果表明,数值计算所得纵杆变形状况与实验和仿真结果基本一致,可以用作伸展臂设计阶段的参考。A mathematic analysis method was proposed for study on longeron deformation of a coilable mast deployed in local coil mode.The method was based on elastic rod analysis theory and conducted with discretizing the mast longeron into a series of rods under the cylinder assumption.Boundary conditions of ideal rods were analyzed,then rod integral conditions in critical state were achieved.Given with a set of initial values,iterative calculations aiming at the first four rods were carried out to obtain the longeron deformation.Subsequently,micro-gravity deployment tests with the existed model and deployment simulations based on finite element model were developed.Through the result comparisons of longeron deformations in critical state,the rationality and validity of the proposed analysis method were evaluated.The results revealed that the mathematic results obtained by the proposed method were approximately consistent with the tested and simulated results,and suitable for the reference of future coilable mast design.Furthermore,the coiling radius decrease during the mast deployment could affect the accuracy of mathematic results,which should be taken into consideration during the method application.

关 键 词：纵杆变形 弹性细杆分析 微重力展开实验 动力学仿真 

分 类 号：V414.2[航空宇航科学与技术—航空宇航推进理论与工程]