中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共6条,第1-6条 帮助

条数/页: 排序方式:
Load-bearing behaviors of the composite gravity-type anchorage: Insights from physical model and numerical tests 期刊论文  OAI收割
ENGINEERING FAILURE ANALYSIS, 2025, 卷号: 167, 页码: 21
作者:  
Wang, Chengtang;  Han, Hongju;  Wang, Hao;  Zhang, Xiuli;  Liu, Xinhua
  |  收藏  |  浏览/下载:2/0  |  提交时间:2025/06/27
Crustal stretching style variations in the northern margin of the South China Sea 期刊论文  OAI收割
TECTONOPHYSICS, 2019, 卷号: 751, 页码: 1-12
作者:  
Bai, Yongliang;  Dong, Dongdong;  Brune, Sascha;  Wu, Shiguo;  Wang, Zhenjie
  |  收藏  |  浏览/下载:51/0  |  提交时间:2019/05/15
Crustal stretching style variations in the northern margin of the South China Sea 期刊论文  OAI收割
TECTONOPHYSICS, 2019, 卷号: 751, 期号: 1, 页码: 1-12
作者:  
Dong, Dongdong;  Bai, Yongliang;  Brune, Sascha;  Wu, Shiguo;  Wang, Zhenjie
  |  收藏  |  浏览/下载:54/0  |  提交时间:2019/04/02
Modeling and Simulation of Chinese SONG telescope 会议论文  OAI收割
Wuhan, Hubei, China, 2013-6-20
作者:  
Guomin Wang;  Liang Gao
收藏  |  浏览/下载:30/0  |  提交时间:2014/02/11
Structural design of primary mirror subassembly for space telescope (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan
作者:  
Xu H.
收藏  |  浏览/下载:66/0  |  提交时间:2013/03/25
In order to design a large aperture primary mirror with the diameter of 1150 mm  the parameters impacting on gravity deformation of the mirror were analyzed and discussed in detail  including material selection  diameter-thickness ratio  the number of the support points  location selection and lightweight structure  etc. A novel space mirror structure system was put forward  and its back was opened and supported by six points on back. The dynamic and static and thermal characteristics were analyzed based on the finite element method. Analysis results showed the surface figure accuracy reached to RMS 14.5nm under the action of gravity load along the optical axis direction and the first-order natural frequency was 214Hz which met to the designed indexes requirements. (2013) Trans Tech Publications  Switzerland.  
Design and test of pointing mirror assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China
作者:  
Chen W.
收藏  |  浏览/下载:39/0  |  提交时间:2013/03/25
In order to ensure the surface figure of the pointing mirror (460mm long  290mm wide) in spaceborne remote sensing camera  Silicon Carbide was selected as the mirror material. The form of composite triangular and rectangular and the combination of open and closed back was explored in the lightweight design. A new kinematic mount and flexible structure in axis is used to hold the mirror around the lateral surface. The structure can minimize distortions induced by coefficient of thermal expansion mismatch among the materials. This eliminates the bending of the integral mount under the weight of the mirror. Optical performance of the mirror was analyzed under gravity load and temperature load using finite element method. Predicted surface figure error based on the removal of bias  tilt and power was calculated using an in-house Matlab script for mirrors. The pointing mirror assembly was tested using open loop servo control. And the surface figure was checked using interferometer. Surface figure accuracy is better than 1/30 ( 632.8nm  rms). The results show that the kinematic mount induces minimal figure error on the optical surface. 2011 IEEE.