基于有限元方法的25m天线座架结构热特性分析

常文文; 艾力&#183;玉苏甫; 许谦; 项斌斌; 胡开宇

doi:10.13433/j.cnki.1003-8728.2015.0532

基于有限元方法的25m天线座架结构热特性分析

doi: 10.13433/j.cnki.1003-8728.2015.0532

1.
中国科学院新疆天文台, 乌鲁木齐 830011;
2.
中国科学院射电天文重点实验室, 乌鲁木齐 830011;
3.
中国科学院大学物理科学学院, 北京 100049

基金项目:

探月三期25米改造项目与西部之光项目（XBBS201122）资助

详细信息

作者简介:
常文文（1987-），硕士研究生，研究方向为天线结构变形、自动控制，changww2013@126.com

计量
- 文章访问数: 187
- HTML全文浏览量: 38
- PDF下载量: 7
- 被引次数: 0
出版历程
- 收稿日期: 2013-09-03
- 刊出日期: 2015-05-05

Thermal Characteristics Analysis of 25 m Antenna Mounts Based on the Finite Element Method

1.
Xinjiang Astronomical Observatory, Chinese Academic of Sciences, Urumqi 830011, China;
2.
Key Laboratory of Radio Astronomy, Chinese Academic of sciences, Urumqi 830011, China;
3.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 通过对南山站太阳照射情况的研究，借助有限元分析软件得到天线座架在太阳照射作用下的瞬态温度场分布和热变形情况。建立天线有限元模型，计算在夏至日晴天无云情况下天线受太阳辐射、空气对流和周围环境长波辐射等边界条件下天线座架在不同时刻的热流密度曲线及温度分布；并对温度场分析结果与座架结构做热-结构耦合分析，得到天线座架的热变形分布。结果表明：在太阳照射作用下，不同时刻座架结构中各条梁的温度变化较大；同一时刻不同的梁的温度分布也有明显差异，最大温差可达9 ℃；热变形量的RMS最大可达1.8 mm，严重的影响到天线的指向。
- 25 m天线 /
- 有限元分析 /
- 热流密度 /
- 温度场 /
- 热变形
Abstract: According to the sun radiation at Nan-Shan, we obtain Xinjiang Astronomical Observatory, via finite element analysis software, the temperature distribution and thermal deformation. Simplify the details and the model was established in ANSYS, and the boundary conditions of solar radiation, periodic air temperature and long-wave radiation are computed each hour in a cloudless day (June 21th) in summer. Then the transient temperature analysis was conducted and the temperature distribution and the deformation of structure were obtained. The result indicated that: the temperature of the antenna mounts changes large in one day, the highest temperature difference reaches 9 ℃; the most serious deformation under sun radiation, which RMS(root mean square) up to 1.8 mm, this significantly influence the pointing accuracy of the antenna.
- antennas /
- deformation /
- finite element method /
- heart transfer /
- solar radiation

HTML全文

参考文献(12)

[1]	徐健生.新疆25 m射电望远镜天线系统检测概况[J].通信与测控,1994,66(3):1-9 Xu J S. The survey of the antenna test system for the 25 m antenna in Xinjiang[J]. Communication and Control,1994,66(3):1-9 (in Chinese)
[2]	朱嘉闿,徐健生.我国VLBI网新的25 m射电望远镜天线系统[J].西部电子,1990,1(1):24-35 Zhu Y K, Xu J S. The new 25 m radio telescope system for Chinese VLBI[J].Western Electronic,1990,1 (1):24-35 (in Chinese)
[3]	李永江,艾力.玉,张正禄,等.天线轨道变形精密测量与指向偏差模型研究[J].武汉大学学报,2013,38(2):176-180 Li Y J, Aili Y, Zhang Z L, et al. Antenna track deformation precise measurement and pointing error model[J]. Geomatics and Information Science of Wuhan University,2013,38(2):176-180 (in Chinese)
[4]	李鹏,段宝岩,郑飞,等.考虑太阳照射的地基面天线机电耦合分析[J].机械工程学报,2012,48(2):136-145 Li P, Duang B Y, Zheng F, et al. Electromechanical coupling analysis of ground reflector antennas in clear-day environment[J]. Journal of Mechanical Engineering,2012,48(2):136-145 (in Chinese)
[5]	金晓飞,范峰,沈世钊.巨型射电望远镜反射面支承结构日照温度场效应分析[J].土木工程学报,2008,41(11):71-76 Jin X F, Fan F, Shen S Z. Effect of non-uniform temperature field under sunshine on the structure supporting the reflector of a large radio telescope-FAST[J]. China Civil Engineering Journal,2008,41(11):136-145 (in Chinese)
[6]	钱宏亮,刘岩,范峰,等.上海65m射电望远镜太阳辐射作用分析[J].工程力学,2012,29(10):378-384 Qian H L, Liu Y, Fan F, et al. The analysis on solar radiation of Shanghai 65m radio telescope[J]. Engineering Mechanics,2012,29(10):378-384 (in Chinese)
[7]	孙祥谦.有限单元法在传热学中的应用[M].北京:科学出版社,1998 Sun X Q. The application of the finite element method in heat transfer[M]. Beijing: Science Press,1998 (in Chinese)
[8]	赵镇南.传热学[M].北京:高等教育出版社,2002 Zhao Z N. Heat transfer theory[M]. Beijing: Higher Education Press,2002 (in Chinese)
[9]	李申生.太阳能物理学[M].北京:首都师范大学出版社,1996 Li S S. Solar physics[M]. Beijing: Capital Normal University Press,1996 (in Chinese)
[10]	刘兴法,等译,凯尔别克.太阳辐射对桥梁结构的影响[M].北京:中国铁道出版社,1981 Liu X F, et al Translate. The influence of solar radiation on bridge structure[M].Beijing: China Railway Publishing House,1981 (in Chinese)
[11]	程刚,陈方斌,袁孝民,等.基于ANSYS的光学器件热变形仿真与分析[J].应用光学,2008,29 (9):697-700 Chen G, Chen F B, Yuan X M, et al. Simulation and analysis of thermal deformation for optical elements based on ansys[J]. Journal of Applied Optics,2008,29(9):697-700 (in Chinese)
[12]	张朝晖.ANSYS 8.0热分析教程与实例解析[M].北京:中国铁道出版社,2005 Zhang C H. Thermal analysis tutorial and examples for ANSYS 8.0[M]. Beijing: China Railway Publishing House,2005 (in Chinese)