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时间:2020-04-12
《《航天器薄壳柔性附件展开耦合行为特性研究》.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第36卷第6期宇航学报Vo1.36No.62015年6月JournalofAstronauticsJune2O15航天器薄壳柔性附件展开耦合行为特性研究游斌弟,温建民,张广玉,赵阳(1.哈尔滨工业大学船舶与海洋工程学院,威海264209;2.哈尔滨工业大学机电学院,哈尔滨150001;3.哈尔滨工业大学航天学院,哈尔滨150001)摘要:为研究大范围运动柔性附件几何非线性和耦合效应与中心刚体的精确动力学行为,以薄壳结构柔性附件为研究对象,引入非线性应变和位移关系,利用虚功原理推导了做大范围运动带柔性附件航天机构的完整非线性动力学模型,所构建的模型包含了非线性几何变形
2、及附加非线性项。针对线性和非线性模型,相应开展了大范围运动航天机构刚柔耦合数值分析。结果表明,随着转速增大,线性与非线性模型动力学特性产生根本差异,指出线性模型忽略了非线性耦合项的不足,而非线性模型可精确地预测大范围运动带柔性附件航天机构动力学行为。结论对航天机构定向和跟踪操作的动力学与控制具有重要的理论价值及工程实际意义。关键词:柔性附件;航天机构;几何非线性;薄壳结构;动力学中图分类号:V419文献标识码:A文章编号:1000—1328(2015)060640—08DOI:10.3873/j.issn.1000.1328.2015.06.004StudyonCo
3、uplingBehaviorofSpacecraftDeploymentwithFlexibleAppendagesofShellStructureYOUBin-di,WENJian—min,ZHANGGuang.yu,ZHAOYang(1.SchoolofNavalArchitectureandOceanEngineering,HarbinInstituteofTechnology,Weihai264209,China2.SchoolofMechanicalandElectricalEngineering,HarbinInstituteofTechnology,H
4、arbin150001,China;3.SchoolofAstronauticsEngineering,HarbinInstituteofTechnology,Harbin150001,China)Abstract:Adynamicsmodelingmethodispresentedforspacecraftwithflexibleappendages.Thedynamicsequationsarederivedtakingintoaccountthegeometricnonlinearityandcouplingdeformationtermscausedbyal
5、argeoverallmotion.Andthenthenonlinearstrain—displacementrelationsareintroduced.andthenonlineardynamicsmodelofspacecraftisdeducedaccordingtothevirtualworkprinciple.Thecompleteexpressionsofgeometricnonlinearityanddynamicstiffnesstermsareconsideredinthedynamicsequations.Spacecraftdynamics
6、areanalyzedforlinearmodelandnonlinearmodelrespectively.Bycomparingthesemodels,bothcorrectnessandaccuracyofpresentnonlinearmodelareverified.Becausegeometricnonlinearityanddynamicstiffnesstermsareignoredinthetraditionallinearmodel,itisnotsuitablefordealingwithlargedeformationrigid·flexib
7、leproblemsundertheconditionofalargeoverallmotion.Furthermore,astherotationalspeedincreases,eficientandaccuratepredictionofdynamicsbehaviorforspacecraftwithflexibleappendagesisachievedbyusingthepresentnonlinearmode1.Theaboveconclusionhasimportantacademicvalueandengineeringsignificance
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