
浏览全部资源
扫码关注微信
1. 中国科学院 长春光学精密机械与物理研究所, 吉林 长春 130033
2. 中国科学院 研究生院 北京,100039
收稿日期:2008-08-10,
修回日期:2008-09-17,
网络出版日期:2009-01-25,
纸质出版日期:2009-01-25
移动端阅览
王富国, 杨洪波, 赵文兴, 杨飞. 1.2 m SiC主镜轻量化设计与分析[J]. 光学精密工程, 2009,17(1): 85-91
WANG Fu-guo, YANG Hong-bo, ZHAO Wen-xing, YANG Fei. Lightweight design and analysis of a 1.2 m SiC primary mirror[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 85-91
为了探索研究大口径轻量化SiC主镜的可行性
对比分析了各种主镜轻量化形式的优缺点
确定了主镜的支撑方式;然后
从理论上计算了轻量化镜体结构参数
设计了采用夹心三明治结构扇形轻量化孔形式的1.23 m SiC轻量化主镜。利用有限元方法分析了轻量化主镜在浮动支撑下的自重变形
两种工况下的面形分别为:PV=9.43 nm
RMS=2.5 nm;PV=16.7 nm
RMS=3.2 nm。分析结果表明
镜体的自重变形影响较小
可以满足要求。而由于SiC的热膨胀系数较大
热变形影响较大
在稳态温度场下
温度每相差1 ℃
镜面面形变化约为PV=40 nm
RMS=4.8 nm
说明为了达到了设计要求
必须对镜体采取热控措施。
In order to explore the feasibility of the large lightweight SiC primary mirror
the different lightweight forms were compared and a supporting way for the primary mirror was determined. After theoretically calculating the light weighted structure parameters
a sandwich structure SiC primary mirror with sector holes was designed. With the finite element method
the self-weight deformation for the lightweight mirror upholded by a float support was analyzed. Under the two different conditions
the mirror surface figures were PV=9.43 nm
RMS=2.5 nm and PV=16.7 nm
RMS=3.2 nm
respectively. The results indicated that the influence of the self-weight deformation is smaller while the thermal deformation is larger because of the large coefficient of thermal expansion of SiC. At steady-state temperature field
when temperature changes 1 ℃
the mirror surface figure changes PV=40 nm
RMS=4.8 nm. These results reported here suggest that the thermal control must be applied to the mirror.
郭喜庆,王悦勇. 大口径反射镜几种轻量化孔结构形式分析[J]. 光学 精密工程,2000, 8(5):518-521. GUO X Q, WANG Y Y. Analysis of structural forms of lightweight hole for heavy-caliber mirror[J]. Opt. Precision Eng., 2000, 8(5): 518-521.(in Chinese)[2] 国绍文,王武义,张广玉,等. 空间光学系统反射镜轻量化技术综述[J]. 光学仪器,2005,27(4):78-82. GUO SH W, WANG W Y, ZHANG G Y, et al.. Lightweight mirror technology for space optical systems[J].Optical Instruments, 2005, 27(4): 78-82.(in Chinese)[3] 韩杰才,姚旺,张宇民. SiC光学反射镜发展现状 . 宇航材料工艺,2005,35(4):1-6. HAN J C, YAO W, ZHANG Y M. Development in SiC optical mirror[J]. Astronavigation Material Technology, 2005,35(4):1-6.(in Chinese)[4] 张舸,赵文兴. 轻型反射镜镜体结构参数的分析[J]. 光学 精密工程,2006,14(1):48-53. ZHANG G, ZHAO W X. Analysis on structural parameters of light-weighted mirror[J]. Opt. Precision Eng., 2006,14(1): 48-53.(in Chiense)[5] 吴清彬,陈时锦,董申. 参数优化方法在轻质反射镜结构设计中的应用[J]. 光学 精密工程,2003,11(5):466-471. WU Q B, CHEN SH J, DONG SH. Optimization of parameters structural design of lightweight reflector[J]. Opt. Precision Eng., 2003,11(5):466-471.(in Chinese)[6] 俞天野,贾建军. 大口径主反射镜的轻量化方案设计[J]. 红外,2007,28(8):6-10. YU T Y, JIA J J. Lightweight design of large diameter mirror[J]. Infrared, 2007,28(8):6-10.(in Chinese)[7] 高明辉,刘磊,任建岳. 空间相机反射镜碳化硅材料性能测试[J]. 光学 精密工程,2007,15(8):1170-1174. GAO M H,LIU L,REN J Y. Characteristic test of SiC for space camera's mirror[J]. Opt. Precision Eng., 2007,15(8):1170-1174.(in Chinese)[8] 杜俊峰,张林波,任戈. 1.3米主镜的支撑设计[J]. 光学 精密工程,2007,15(10):1483-1488. DU J F,ZHANG L B,REN G.. Mounting system design for 1.3 m primary mirror[J]. Opt. Precision Eng., 2007,15(10):1483-1488. (in Chinese)[9] 张舸,赵汝成,赵文兴. 碳化硅陶瓷新型反应连接技术[J]. 光学 精密工程,2008,16(6):1037-1041. ZHANG G, ZHAO R CH, ZHAO W X. Novel reaction—formed joint technology for reaction bonded silicon carbide ceramics[J]. Opt. Precision Eng., 2008,16(6):1037-1041.(in Chinese)[10] PRAVIN K M. Flexural rigidity characteristics of light-weighted mirrors[J]. SPIE, 1987, 748: 158-171.
0
浏览量
586
下载量
23
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621