摘要
为了研究应用于大口径空间光学遥感器中由碳纤维复合材料(CFRP)制成的精密支撑构件的结构稳定性,设计并研制了连接在主、次镜间的CFRP连接筒。由给定的主、次镜间角度变化量计算出连接筒前端面的最大挠度,根据实际载荷情况建立等效力学模型,计算连接筒轴向弹性模量,结合复合材料层压板理论,确定碳纤维铺层的合理形式。然后,运用ANSYS软件对有限元模型进行分析,计算主、次镜间的角度变化量和支撑结构的模态分布。最后,通过量级逐增的力学试验,采用光学测量方法测量主、次镜间角度变化量,验证CFRP连接筒的结构稳定性。实验结果显示:主、次镜间角度变化量<10″,CFRP支撑构件一阶基频>75 Hz。CFRP支撑构件满足主、次镜间角度变化量要求,具有较好的结构稳定性。
In order to study the structure stability of fine support components made of Carbon Fiber Reinforced Polymer （CFRP） in a large-aperture space optical remote sensor, a CFRP joint cylinder between primary mirror and second mirror was designed and manufactured. The maximum deflection was calculated in the light of the angle change between primary mirror and second mirror, and the mechanical model of the joint cylinder was established according to actual load. The axial elastic modulus based on the model was calculated and the an appropriate layer sequence CFRP was determined by composite laminate theory. Then, the angle between the two mirrors and the modal distribution of support structure were calculated based on software ANSYS. Finally, the structure stability was validated by the crescent mechanic test and optical measurement method. The results show that the angle displacement between primary mirror and second mirror is less than 10°, the first-order natural frequency of CFRP support component is greater than 75 Hz. CFRP support has better structure stability, which satisfies the requirement of general technologic index.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2008年第11期2173-2179,共7页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.60507003)
关键词
空间光学遥感器
碳纤维复合材料
结构稳定性
光学测量
space optical remote sensor
Carbon Fiber Reinforced Polymer（CFRP）
structure stability
optical measurement
