| 星箭连接界面处环形分布动载荷识别 |
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| 引用本文： | 尹健,吴邵庆,陈树海. 星箭连接界面处环形分布动载荷识别[J]. 宇航学报, 2019, 40(12): 1393-1402. DOI: 10.3873/j.issn.1000-1328.2019.12.002 |
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| 作者姓名： | 尹健 吴邵庆 陈树海 |
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| 作者单位： | 1. 东南大学工程力学系，南京 210096；2. 东南大学空天机械动力学研究所，南京 211189； 3. 上海卫星工程研究所，上海 201109 |
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| 基金项目： | 国家自然科学基金（11402052）；江苏省优秀青年基金（BK20180062）;江苏省“六大人才高峰”项目（KTHY005） |
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| 摘 要： | 提出一种基于卫星结构响应的环形分布动载荷识别方法。首先基于脉冲响应函数，在时域内构建激励与响应之间的传递关系；进一步，利用B样条函数表示动载荷的环形分布函数，并结合卫星结构有限元模型和结构测点加速度响应，识别了动载荷的分布函数及其时间历程。以某卫星模型开展数值仿真研究，结果表明：在不同噪声水平，响应测点数以及B样条控制点数的情况下，本文所提出的方法能够准确识别卫星结构所受分布动载荷。本文方法能够为实际飞行情况下卫星载荷环境评估提供理论支撑。
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| 关 键 词： | 星箭连接界面 环形分布动载荷 卫星结构响应 载荷识别 B样条函数 |
| 收稿时间： | 2018-12-12 |
Identification of Annularly Distributed Dynamic Load at Interface between Satellite and Rocket |
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| YIN Jian,WU Shao qing,CHEN Shu hai. Identification of Annularly Distributed Dynamic Load at Interface between Satellite and Rocket[J]. Journal of Astronautics, 2019, 40(12): 1393-1402. DOI: 10.3873/j.issn.1000-1328.2019.12.002 |
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| Authors: | YIN Jian WU Shao qing CHEN Shu hai |
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| Affiliation: | 1. Department of Engineering Mechanics, Southeast University, Nanjing 210096, China; 2. Institute of Aerospace Machinery and Dynamics, Southeast University, Nanjing 211189, China; 3. Shanghai Institute of Satellite Engineering, Shanghai 201109, China |
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| Abstract: | An annularly distributed dynamic load identification method based on the structural response of a satellite is proposed. Firstly, based on the impulse response function, the transfer relationship between the excitation and response is constructed in the time domain. Then, the B-spline function is used to represent the annular distribution function of the dynamic load, and with the finite element model of the satellite and the structural acceleration response, the annular distribution function and the time histories of the dynamic load are identified. The numerical simulation study on a satellite model is conducted, and the results show that the proposed method can accurately identify the distributed dynamic load of the satellite structure under different noise levels, measurement points and B-spline control points. This method can provide a theoretical support for load environment assessment of a satellite in real flight conditions. |
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| Keywords: | Interface between satellite and rocket Annularly distributed dynamic load Structural response of satellite Load identification B-spline function |
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