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Analyses and improvement method of sliding failures and structural damage of the triangular reflector elements in FAST |
| LI Hui1,2, SONG Liqiang1,2, YANG Qingge1,2, LI Qingwei1,2 |
1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
2. Key Laboratory of FAST, Chinese Academy of Sciences, Beijing 100101, China |
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Abstract This paper describes the configuration and operating principle of the five-hundred-meter aperture spherical radio telescope (FAST) reflector elements with sliding failures and the resulting structural damage analyzed using mechanical modelling of the triangular reflector elements. Design improvements were then developed to avoid such failures and damages, including new arrangements of the adaptive connecting mechanisms, element failure identification methods and upgrade of the adaptive connecting mechanisms. The analysis model helps maintenance staff find the main reasons for triangular element failures and predict possible failure modes and damaged element positions to develop improved designs. The results enable the staff to more quickly locate abnormal reflector elements using routine visual inspection and prevent the worse failures to improve equipment maintenance and enable future upgrades.
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| Keywords
FAST
reflector element
adaptive connecting mechanism
failure and damage
mechanical analysis
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Issue Date: 19 October 2022
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2022,
Vol. 62
