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。
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.
作者
尹健
吴邵庆
陈树海
YIN Jian;WU Shao-qing;CHEN Shu-hai(Department of Engineering Mechanics,Southeast University,Nanjing 210096,China;Institute of Aerospace Machinery and Dynamics,Southeast University,Nanjing 211189,China;Shanghai Institute of Satellite Engineering,Shanghai 201109,China)
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2019年第12期1393-1402,共10页
Journal of Astronautics
基金
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(KTHY-005)
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
Interface between satellite and rocket
Annularly distributed dynamic load
Structural response of satellite
Load identification
B-spline function
