新闻
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China

洞穿未来的“超级天眼”

2017-06-08 11:32:23   新华网

500米口径球面射电望远镜(FAST)工程施工场面和满天繁星相映生辉(2016年6月27日摄)。

新华社贵阳6月7日电 题:洞穿未来的“超级天眼

新华社记者齐健

被誉为“天眼”的国家重大科技基础设施500米口径球面射电望远镜2016年9月25日落成启用。经过8个多月的前期调试,近日启动试观测,进入边观测边调试的关键阶段。

国外可参考的大口径望远镜,一般需要3年左右调试。“天眼”采用主动反射面板,控制参数更为复杂。中科院国家天文台的工作团队昼夜无休,为的是在最短时间内完成调试,尽快发挥其科研能力。

古有十年磨一剑,今有二十年“铸天眼”。“天眼”的研制和建设,饱含着中国人对探索宇宙新知的向往。它由中国天文学家于1994年提出构想,经过13年预研究,2007年7月立项,2011年3月开工,历时5年半建设完成。关键技术无先例可循、关键材料急需攻关、核心技术遭遇封锁……从预研到建成的22年时间里,我国老中青三代科技工作者克服了不可想象的困难。

2010年8月,在“天眼”工程开工前夕,团队接到哈尔滨工业大学传来的消息,前期做的所有索网实验全都失败了。“国内顶级的应用于斜拉桥上的钢索,标准强度是200兆帕、抗200万次弯曲,用在‘天眼’实验上都断了。”馈源支撑系统总工程师孙才红说,按设计要求,“天眼”需要强度为500兆帕、抗200万次弯曲的钢索,这意味着把材料工艺提高到国标水平的2.5倍。

当时负责索网疲劳问题的是刚到天文台工作不久的博士生姜鹏,他立下“军令状”,扎根合作研究的公司一线,经过一年半的艰苦技术攻关,完成了索网变位策略优化及疲劳性能评估工作,降低了索网的变位应力幅,最终生产出满足要求的钢索。

美国阿雷西博望远镜的馈源平台重达1000吨,几乎等于用固定轨道把平台架设在半空,这样的设计有利于馈源的定位,却缩小了观测角度。

经过密集的科研攻关,“天眼”最终创新性采取轻型索支撑馈源平台方案,把馈源舱减重到30吨,覆盖天顶角是美国望远镜的两倍,并通过并联机器人二级调整,最终在降低建造成本的同时,实现毫米级高精度定位。

上一页1/2下一页
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China

相关阅读

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
分享到:
0 0
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China

美图推荐

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China

为您推荐

加载更多>>
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170608/30678192.html
Server: cms-8-251
Date: 2024/11/25 09:46:09

Powered by China
China