大型GEO通信平台主动段力热综合性能分析  

Thermo-mechanical Deformation Analysis of the Powered-Flight Phase of Large GEO Communication Plateform

作　　者：陶家生[1] 林骁雄 王浩攀[1] 钟红仙 TAO Jiasheng;LIN Xiaoxiong;WANG Haopan;ZHONG Hongxian(Institute of Telecommunication Satellite,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院通信与导航卫星总体部,北京100094

出　　处：《上海航天（中英文）》2022年第6期148-154,共7页Aerospace Shanghai（Chinese&English）

基　　金：大型高轨通信卫星(型号项目)。

摘　　要：对于大型高价值卫星,为增强卫星的抗风险能力,在极端温度环境、相较一般发射工作程序有所偏离的情况下,进行了卫星平台的力热性能分析。分析结果表明:采用3D舱板的有限元分析模型能够更好地揭示平台的结构变形;主动段的热变形只占力热综合变形的较少部分,并且随着主动段趋于结束,热变形在力热综合变形的占比在增加。平台的热分析温度结果为50.84~-11.89℃,未超出卫星的极限温度要求,表明卫星的热性能有一定保持能力。但是,热耗较大的舱板在给定的较极端边界条件下,分析结果较一般条件下的热平衡试验结果温度高约25℃。力热综合分析的结构变形结果最大为1.73 mm,不会危及卫星结构强度,表明卫星平台具有一定结构性能保持能力,但结构变形的结果已经接近结构局部精度的要求量级,值得关注。In order to enhance the anti-risk capacity of high-figure large communication satellites,the thermomechanical properties of the satellite platform are analyzed under the extreme thermal environmental conditions and unusual launching procedure. The results indicate that the adopted finite element analysis model for three-dimensional(3D)plates can well reveal the structural deformation of the satellite platform. The thermal deformation is only a small amount of the thermo-mechanical deformation within the powered-flight phase,and the proportion of the thermal deformation decreases while the proportion of the thermo-mechanical deformation increases with the powered-flight phase. The temperature obtained by the platform thermal analysis ranges from-11.89 ℃ to 50.84 ℃,which is within the limit temperature requirement,indicating that the platform can keep operation under the temperature condition.However,the temperature obtained by the thermal analysis under a given extreme thermal environmental condition is about 25 ℃ higher than that obtained by the thermal balance test under a general condition. The maximum thermomechanical deformation of the platform is 1.73 mm,which is within the structure strength requirement of the satellite,indicating that the satellite platform can keep operation under the structure condition. However,it should be noted that the structural deformation result is near the partial deformation demand of the structure.

关 键 词：通信卫星 地球同步轨道(GEO) 主动段 热分布 力热综合 有限单元法(FEM) 复合材料 

分 类 号：V11[航空宇航科学与技术—人机与环境工程]