| 航天员出舱牵引构型设计与结构响应性能评估 |
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| 引用本文： | 杨全欧,李志辉,秦远田,包为民.航天员出舱牵引构型设计与结构响应性能评估[J].宇航学报,2023,44(2):168-177. |
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| 作者姓名： | 杨全欧 李志辉 秦远田 包为民 |
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| 作者单位： | 1. 中国空气动力研究与发展中心，绵阳 621000；
2. 南京航空航天大学航天学院，南京 211106；
3. 中国航天科技集团有限公司，北京 100048 |
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| 摘 要： | 针对航天员出舱过程所用安全绳锁挂频繁的问题，进行了安全高效的航天员出舱牵引系统构型设计，可作为太空行走的辅助导向装置。基于材料结构弹塑性力学方程与含应变耦合项的热传导方程，推导结构热力响应可计算数学模型，利用Newmark方法以及Crank-Nicolson数值格式分别对热弹性方程和热传导方程进行时间域上的离散，构造金属结构响应无条件稳定隐式有限元格式，搭建了温度场与位移场相互影响热力耦合有限元算法(FEM)性能评估软件系统，以此对牵引系统的导轨进行热力耦合数值计算，得到在太阳辐射外热流载荷作用下具有较强抗变形能力的结论。计算了航天员采用牵引系统出舱时对导轨产生的拉力，并借助ANSYS Workbench对导轨进行静力学求解，验证了该牵引系统具备结构强度可靠性，可为空间站建设舱外作业平台提供重要理论分析依据与设计参考。
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| 关 键 词： | 舱外活动 牵引系统 热力响应可计算建模 有限元算法 强度校核 |
| 收稿时间： | 2022-02-15 |
Configuration Design of Astronaut Out capsule Traction System and Performance Evaluation of Structural Response |
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| YANG Quanou,LI Zhihui,QIN Yuantian,BAO Weimin.Configuration Design of Astronaut Out capsule Traction System and Performance Evaluation of Structural Response[J].Journal of Astronautics,2023,44(2):168-177. |
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| Authors: | YANG Quanou LI Zhihui QIN Yuantian BAO Weimin |
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| Affiliation: | 1. China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
3.China Aerospace Science and Technology Corporation, Beijing 100048, China |
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| Abstract: | Aiming at the problem that the safety rope is frequently locked during the extravehicular activities, a safe and efficient configuration of extravehicular traction system is designed, which can be used as an auxiliary guide device for spacewalking. Based on the elastoplastic mechanics equations of material structures and the heat conduction equations with strain coupling terms, a computable mathematical model is derived to research the thermo mechanical coupling effects. The Newmark method and the Crank Nicolson scheme are utilized to construct the unconditionally stable implicit finite element scheme for the response of the metal structure. In this way, the thermo mechanical coupling numerical calculation of the guiding rail in the traction system is carried out, and the conclusion complies with the use requirement. The force generated by the astronauts on the tracks is analyzed, and ANSYS Workbench is applied to perform statics analysis. It has been verified that the traction system has the structural strength and reliability, and can provide an important theoretical analysis basis and design reference for the construction of the extravehicular operation platform of the space station. |
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| Keywords: | Extravehicular activities Traction system Computable modeling for thermodynamic response Finite element algorithm Strength check |
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