空间带网展开动力学与仿真研究

空间飞网技术因其结构简单可靠,易于实现等特点,成为空间碎片抓捕研究热点。本文使用强度更高,缠绕较少的空间网带替代传统绳网,并对其动力学模型进行研究。首先,采用多种弹簧的弹簧-质点法建立了空间带网动力学模型,进行了带网自由悬垂仿真。并通过与ABAQUS所建立的仿真模型进行对比,验证了动力学模型的正确性,并讨论了剪切弹簧与弯曲弹簧对模型的影响。其次,进行了带网与绳网抛射展开对比仿真,测试带网发射性能。最后,分别进行了空间带网的直接抛射展开与旋转展开仿真,讨论了两种展开方式对空间带网展开的影响。结果表明：抛射展开展开速度快,最大展开面积高,旋转展开过程平稳,两者保形时间相同。可见抛射展开优于旋转展开。

Dynamics and simulation of space belt network

Because of its simple and reliable structure and easy to implement, spaceflight technology has become a hot spot for space debris capture. In this paper, the space mesh belt with higher strength and less winding is used to replace the traditional rope mesh. Firstly, the spring - particle method is used to establish the dynamic model of the space belt network, and the simulation of the free suspension of the belt network is carried out. By comparing with the simulation model established by ABAQUS, the correctness of the dynamic model is verified, and the influence of shear spring and bending spring on the model is discussed. Secondly, the strip net and rope net projectiles are compared and simulated to test the strip net emission performance. Thirdly, the direct projectile expansion and rotation expansion are simulated respectively, and the influences of the two expansion modes on the spatial belt network are discussed. The results show that the projectile has a fast expansion speed, a high maximum expansion area, a smooth rotation and the same conformal time. So the projectile spread is better than the rotation spread.