《阿雷西博天文台的305米望远镜倒塌》

  • 来源专题:重大科技基础设施领域知识集成服务平台
  • 编译者: 魏韧
  • 发布时间:2021-03-19
  • 2020年12月1日,位于波多黎各阿雷西博天文台的高305米望远镜的平台倒塌,损坏了天线及周围设施。

    自11月6日钢缆发生故障以来,美国国家科学基金会(NSF)要求望远镜周围区域的非工作人员撤离,同时由工程师评估天文台其他结构的稳定性。虽然望远镜是该设施的关键组成部分,但该天文台还有其他科学、教育基础设施。NSF将与相关方合作使其恢复运转。

    望远镜的三个支撑塔的顶部均已损毁。当900吨重的仪器平台倒塌时,望远镜的支撑钢缆也倒了。此外,天文台的学习中心因钢缆掉落而遭受了严重破坏。NSF将与管理天文台的中佛罗里达大学(UCF)合作,调查平台倒塌的原因。

    此前,这台305米望远镜已经表现出即将坍塌的风险。NSF、UCF和其他参与方,包括UCF签约的工程公司,一直在监视它的情况,但是他们也没有料到平台会坍塌。2020年8月,望远镜的一根钢缆意外断裂。工程师们制定维修计划时,他们估计剩余的钢缆承受负荷毫无问题。但是,11月6日,又有一根钢缆断裂,他们认为该结构无法安全修复。

    NSF打算继续授权UCF来支付阿雷西博工作人员的薪水,并采取行动继续在天文台进行研究工作,例如维修用于射电天文学的12米望远镜以及LIDAR设施的屋顶(一种地理空间研究工具)。维修费用来自应对玛丽亚飓风破坏的国会补充拨款。

    一旦确定了现场安全性,在条件允许的情况下,天文台将进行其他工作。

  • 原文来源:https://www.nsf.gov/news/news_summ.jsp?cntn_id=301737&org=NSF&from=news
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