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离轨帆弹性桅杆力学性能分析
李媛媛, 贾敏涛, 王震, 肖燕妮, 赵长喜
北京卫星制造厂有限公司
摘要:
采用有限元分析软件ABAQUS分析弹性桅杆几何参数对其力学性能的影响,为离轨帆弹性桅杆设计提供一定的理论依据。结果表明:1)增加壳体厚度、保持弧长不变,减小曲率半径以及增大壳体截面圆心角都能有效提高离轨帆自动展开能力及弹性桅杆支撑刚度;2)弹性桅杆的弯曲内部应力只与材料属性,曲率半径r,缠绕半径R以及壳体厚度t有关。曲率半径减小,壳体厚度增加都会增大弹性桅杆的弯曲内部应力,有可能会导致弹性桅杆在缠绕时发生塑性变形。因此,在对弹性桅杆设计时,需综合考虑弹性桅杆几何参数对其展开能力以及缠绕性能的影响。
关键词:  弹性桅杆,展开弯矩,支撑刚度,弯曲内应力
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Mechanical Properties Analysis of the Drag Sail Device Boom
Li Yuan-yuan, Jiamintao, Wang Zhen, xiaoyanni, Zhao Chang-Xi
Beijing Spacecraft
Abstract:
The finite element analysis software ABAQUS was used to analyze the influence of geometric parameters of the boom on its mechanical properties, providing a theoretical basis for the design of the boom of drag sail device. The results show that: 1) increasing the shell thickness and decreasing the radius of cross section with a constant arc length and increasing the angle of the shell section can effectively improve the automatic expansion capacity of the drag sail device and the support stiffness of the boom. 2) the internal bending stress of the boom is only related to material properties, the radius of cross section r, bending radius R and shell thickness t. As the radius of cross section decreases and the shell thickness increases, the internal bending stress of the boom will increase, which may lead to the plastic deformation of the boom when it is convolved. Therefore, the influence of the geometric parameters of the boom on its expansion capacity and winding performance should be considered comprehensively when designing the boom of the drag sail device.
Key words:  the boom of the drag sail device  steady bending moment  the support stiffness  the internal bending stress