航天器蜂窝夹层板对称热变形分析及试验验证

摘要

分析了太阳同步轨道遥感卫星某遥感仪器安装板在平面温度场下的热变形特点,考虑蜂窝芯子横向胀缩,建立了对称热变形问题理论模型,给出控制方程和级数解.同时设计了热变形试验,采用数字近景摄影测量光轴指向变化.理论分析结果与试验结果一致性较好,表明可采用该模型对蜂窝板在轨热变形进行预示.典型高低温工况下蜂窝夹层板对称热变形造成安装其上的相机光轴指向变化在20″左右,选用相对稀疏、较矮的蜂窝芯子,可降低热变形的影响.%The thermal deformation of satellite honeycomb sandwich plate in plane temperature field is analyzed in this paper,the control equation and series solution in consideration of honey﹣comb core’s transversal deformation is also given.The thermal deformation test was designed;the change of optical axis pointing was adopted by digital close﹣up photogrammetry.The theoreti﹣cal results are in good agreement with the experimental results,which indicates that the theoreti﹣cal model can be used to prefabricate the thermal deformation.Under typical high and low tem﹣perature working conditions,the optical axis pointing error caused by symmetrical thermal de﹣formation of aluminum honeycomb sandwich plate is about 20″.The relatively sparse and short honeycomb core can reduce the influence of thermal deformation.