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
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.
李辉, 宋立强, 杨清阁, 李庆伟. FAST三角形反射面单元滑动故障与结构损伤的力学分析和改进方法[J]. 清华大学学报（自然科学版）, 2022, 62(11): 1823-1832.
LI Hui, SONG Liqiang, YANG Qingge, LI Qingwei. Analyses and improvement method of sliding failures and structural damage of the triangular reflector elements in FAST. Journal of Tsinghua University(Science and Technology), 2022, 62(11): 1823-1832.
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2022, Vol. 62 
