宇航学报

宇航学报 ›› 2014, Vol. 35 ›› Issue (8): 871-877.doi: 10.3873/j.issn.1000-1328.2014.08.002

• 飞行器设计与力学 • 上一篇    下一篇

柔性绳网动力学建模与天地差异性分析

张青斌，孙国鹏，丰志伟，祁玉峰，刘永健，高庆玉   

  1. 1. 国防科学技术大学航天科学与工程学院，长沙 410073； 2.北京空间飞行器总体设计部，北京 100094
  • 收稿日期:2013-07-24 修回日期:2014-02-17 出版日期:2014-08-15 发布日期:2014-08-25
  • 基金资助:

    国家自然科学基金（11272345）

Dynamics Modeling and Differentia Analysis Between Space and Ground for Flexible Cable Net

ZHANG Qing bin,  SUN Guo peng,  FENG Zhi wei,  QI Yu feng,  LIU Yong jian,  GAO Qing yu   

  1. 1.College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    2.Beijing Institute of Spacecraft System Engineering, Beijing 100094, China
  • Received:2013-07-24 Revised:2014-02-17 Online:2014-08-15 Published:2014-08-25

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摘要：

采用有限元模型研究了柔性绳网系统的动力学特性。针对空间绳网直接弹射展开方式，首先将绳网离散为若干单元，各单元处理为非线性“半阻尼弹簧”模型，然后分别计算各单元所受气动力和重力，最终建立绳网系统多柔体动力学模型。基于所建立的动力学模型分别对柔性绳网在地面和太空展开的动力学过程进行了仿真分析，研究了绳网在展开面积、空间位形和飞行距离等方面的天地差异性及其动力学机理，为未来空间绳网系统的分析设计提供理论参考。

关键词: 空间绳网, 有限元方法, 柔性多体系统动力学

Abstract:

The dynamics characteristics of a flexible cable net is investigated based on finite element method. In this paper, the flexible net is modeled as a series of collected semi linear damper and springs with masses lumped at appropriated nodes. The motion equations of each cable node are developed by considering internal elastic force and external forces including the aerodynamic force and gravity. Then a flexible multibody system model is built to predict the dynamics characteristics of the space net. The deployed area, shape and flight range of the space net are compared under orbital and ground environments, which can be used to design and analysis of future space nets.

Key words: Space tethered net, Finite element method, Flexible multibody system dynamics

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