航天相机碳纤维外罩结构及模态分析和试验  

CFRC outer baffle structure & modal analysis and test of space camera

作　　者：初昶波[1] 柴文义[1] 张昊苏[1] 贺天兵[1] 汶德胜[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119

出　　处：《红外与激光工程》2013年第4期1033-1037,共5页Infrared and Laser Engineering

基　　金：国家863计划(2011AA7085020)

摘　　要：采用高强度的碳纤维复合材料T300设计、制造了具有较复杂外形和多级斜挡光环的航天相机外遮光罩,并简要介绍了制造工艺过程。运用有限元法完成了模态分析,利用现有工装联接碳纤维外罩完成了模态测试,得到了其径向模态及其振型,并给出了试验频响函数图。通过比较有限元分析和试验测试数据表明,有限元分析模型与实际产品各阶模态误差均在2.3%以内。由此可见,碳纤维外罩结构合理,采用的有限元分析方法可行,该方法如扩展到大型航天相机动力学建模过程,将对设计相机整机结构具有指导意义。Outer baffle of space camera was designed and manufactured with more complicated shape and multilevel inclined vanes using high strengthened carbon fiber reinforced composite （CFRC） T300. Meanwhile the manufacturing process was introduced briefly. Modal analysis was finished with finite element method （FEM）. Fixing the outer baffle on an existing fixture the modal test was finished and the radial modes and shapes were obtained, the test frequency response function map was also presented. Comparing the finite element analysis （FEA） and testing data it is indicated that the error of every mode is less than 2.3% between the FEA model ＆ the fact product. It can be seen that the structure of CFRC outer baffle is reasonable and the FEM is feasible. Used into the kinetic modeling process of the space camera, the FEM could have guidance significance to the design of the whole structure of camera.

关 键 词：模态试验 航天相机 碳纤维外罩 

分 类 号：TP7[自动化与计算机技术—检测技术与自动化装置] O439[自动化与计算机技术—控制科学与工程]