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| Dynamic characteristics analysis of slender flexible space structure undergoing large overall motions |
| Received:May 20, 2014 Revised:August 17, 2014 |
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| DOI：10.7511/jslx201504011 |
| KeyWord:on-orbit transportation floating reference frame rigid-flexible coupling free-free boundary assumed mode method Rayleigh-Ritz method |
| Author | Institution |
| 赵国威 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 |
| 吴志刚 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 ;大连理工大学 航空航天学院, 大连 |
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| 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 uncoupling model is not reasonable. |
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