计算力学学报Issue(4)：512-517,6.DOI:10.7511/jslx201504011
大范围运动细长柔性空间结构动力学特性分析
Dynamic characteristics analysis of slender flexible space structure undergoing large overall motions
摘要
Abstract
Dynamic characteristics analysis of slender flexible space structure undergoing large overall motions is very important for the motion analysis and subsequent motion controller design.To begin with,a floating reference frame is chosen as local reference frame,whose origin is consistent with the center of mass,to establish structure’s kinematic relationships;after that,the assumed mode method is used for discretizing the deformation;then,the rigid-flexible coupling vibration equations of structure undergoing large overall motions are obtained based on Lagrange’s equation;next,using Rayleigh-Ritz method,the bending modes without undergoing large overall motions are selected as the basic functions to derive eigenfunction;furthermore,solving the eigenfunction to derive bending frequencies and mode shapes;finally,through several numerical examples,the difference of bending frequencies and mode shapes between uncoupling model and coupling model is discussed,and the results show that the uncoup-ling model is not reasonable.关键词
在轨搬运/浮动坐标系/刚柔耦合/自由-自由边界/假设模态法/Rayleigh-Ritz法Key words
on-orbit transportation/floating reference frame/rigid-flexible coupling/free-free boundary/assumed mode method/Rayleigh-Ritz method分类
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赵国威,吴志刚..大范围运动细长柔性空间结构动力学特性分析[J].计算力学学报,2015,(4):512-517,6.基金项目
国家自然科学基金(11072044) （11072044）
高等学校博士学科点专项科研基金(20110041130001) （20110041130001）
教育部新世纪优秀人才支持计划(NCET-11-0054)资助项目 （NCET-11-0054）
