金路, 李勃衡, 田大可. 大口径网面空间可展开天线结构撞击动力响应研究[J]. 工程力学, 2023, 40(S): 276-282. DOI: 10.6052/j.issn.1000-4750.2022.06.S011
引用本文: 金路, 李勃衡, 田大可. 大口径网面空间可展开天线结构撞击动力响应研究[J]. 工程力学, 2023, 40(S): 276-282. DOI: 10.6052/j.issn.1000-4750.2022.06.S011
JIN Lu, LI Bo-heng, TIAN Da-ke. IMPACT DYNAMIC RESPONSE RESEARCH ON LARGE APERTURE SPACE DEPLOYABLE ANTENNA WITH CABLE-MESH[J]. Engineering Mechanics, 2023, 40(S): 276-282. DOI: 10.6052/j.issn.1000-4750.2022.06.S011
Citation: JIN Lu, LI Bo-heng, TIAN Da-ke. IMPACT DYNAMIC RESPONSE RESEARCH ON LARGE APERTURE SPACE DEPLOYABLE ANTENNA WITH CABLE-MESH[J]. Engineering Mechanics, 2023, 40(S): 276-282. DOI: 10.6052/j.issn.1000-4750.2022.06.S011

大口径网面空间可展开天线结构撞击动力响应研究

IMPACT DYNAMIC RESPONSE RESEARCH ON LARGE APERTURE SPACE DEPLOYABLE ANTENNA WITH CABLE-MESH

  • 摘要: 在轨运行的大口径空间可展开天线可能会遭遇空间碎片的高速撞击,这严重威胁了星载天线的安全服役。为研究空间网面可展天线支承结构及抛物面索网在高速撞击时的动力响应,选用ANSYS/AUTODYN有限元软件,建立大口径空间网面可展开天线动力学撞击仿真模型,模拟天线展开锁定时遭遇2.5 mm~7.5 mm的空间碎片撞击的全过程动力响应。考虑1.0 km/s~15.0 km/s的撞击速度和不同撞击位置工况下,天线结构的整体动力响应、关键杆件及抛物面索网损伤状态以及结构整体变形性能。结果表明:空间可展天线结构受微小空间碎片撞击的结构响应过程可分为局部振动、拉索约束以及整体振动三个阶段,撞击点越靠近天线形心,结构响应越明显,结构的平均变形越大;随着撞击速度增大,可展天线的结构平均变形表现为先增加后减小趋势,当撞击速度大于12.5 km/s时,天线受撞击的影响区域逐渐缩小;空间可展天线受微小空间碎片高速撞击时整体形面变形不可忽视,可为后续天线结构防护及易损性分析提供参考。

     

    Abstract: The large aperture space deployable antenna in orbit may encounter high-speed impacts from tiny space debris, which seriously threatens the safe service of the antenna on board. In order to study the dynamic response of the support structure of the space mesh deployable antenna and the parabolic cable-mesh during high speed impact, ANSYS/AUTODYN is selected to build a dynamic impact simulation model of the large aperture space mesh deployable antenna to simulate the dynamic response of the antenna during the impact with space debris of 2.5 mm-7.5 mm when the antenna is deployed and locked. The overall dynamic response of the structure, the damage state of key rods and parabolic cable network as well as the deformation performance of the structure as a whole are considered for impact velocities of 1.0 km/s-15.0 km/s and different impact position conditions. The results show that the structural response of the spatially expandable antenna structure to space debris impact can be divided into three stages: local vibration, cable restraint and overall vibration. A closer distance between the impact point and the centre of the antenna leads to more obvious structural response and larger average deformation of the structure. As the impact velocity increases, the average structural deformation of the spreading antenna tends to increase initially and then decrease. When the impact velocity is greater than 12.5 km/s, the impact area of the antenna is gradually reduced. The overall deformation of the spreading antenna is not negligible when it is impacted by tiny space debris at high velocity, which can provide reference for the subsequent structural protection and vulnerability analysis.

     

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