航天器工程
航天器工程
항천기공정
SPACECRAFT ENGINEERING
2012年
3期
35-40
,共6页
空间可展开桁架%热变形分析%热膨胀系数%敏度分析%优化设计
空間可展開桁架%熱變形分析%熱膨脹繫數%敏度分析%優化設計
공간가전개항가%열변형분석%열팽창계수%민도분석%우화설계
space deployable truss%analysis of thermal deformation%coefficient of thermal expan-sion%sensitivity analysis%optimization design
文章就一种空间可展开平板天线支撑桁架结构的热膨胀系数设计，针对传统靠经验试凑的情况，提出了一种热膨胀系数优化设计方法。该方法首先通过分析计算各杆件轴的热膨胀系数对热变形的影响（即计算热变形对杆件轴向热膨胀系数的敏度），根据敏度绝对值的大小对杆件进行分组；其次，在给定最大热变形约束下，将敏感杆件组的热膨胀系数设为设计变量进行优化，计算杆件热膨胀系数极值，从而确定其所能允许的可行范围；最后对计算所得的热膨胀系数范围进行了校验和参数分配，经计算，在此范围内取值符合最大变形约束要求。
文章就一種空間可展開平闆天線支撐桁架結構的熱膨脹繫數設計，針對傳統靠經驗試湊的情況，提齣瞭一種熱膨脹繫數優化設計方法。該方法首先通過分析計算各桿件軸的熱膨脹繫數對熱變形的影響（即計算熱變形對桿件軸嚮熱膨脹繫數的敏度），根據敏度絕對值的大小對桿件進行分組；其次，在給定最大熱變形約束下，將敏感桿件組的熱膨脹繫數設為設計變量進行優化，計算桿件熱膨脹繫數極值，從而確定其所能允許的可行範圍；最後對計算所得的熱膨脹繫數範圍進行瞭校驗和參數分配，經計算，在此範圍內取值符閤最大變形約束要求。
문장취일충공간가전개평판천선지탱항가결구적열팽창계수설계，침대전통고경험시주적정황，제출료일충열팽창계수우화설계방법。해방법수선통과분석계산각간건축적열팽창계수대열변형적영향（즉계산열변형대간건축향열팽창계수적민도），근거민도절대치적대소대간건진행분조；기차，재급정최대열변형약속하，장민감간건조적열팽창계수설위설계변량진행우화，계산간건열팽창계수겁치，종이학정기소능윤허적가행범위；최후대계산소득적열팽창계수범위진행료교험화삼수분배，경계산，재차범위내취치부합최대변형약속요구。
An optimization design approach of the coefficient of thermal expansion of the space de- ployable truss with the flat panel antennas is presented in order to improve the traditional method based on experience. Firstly, the sensitivities of the thermal deformation to bars~ axial thermal expansion coefficient are analyzed as to separate the most sensitive trusses from all the trusses on the basis of the absolute values of sensitivities in the approach. Secondly, the feasible interval of the bars＇ axial coefficient of thermal expansion is determined by its extreme value obtained by the optimized analysis for maximum thermal deformation constraints by mean of selecting the bars ＇ axial coefficient of thermal expansion as the design variable. Finally, the validity of the range and the allocation of parameters is considered. It is proved that all the value in the range is practicable under the maximum thermal deformation constraints.
