Residual bearing capacity of the steel cables and anchorages of the FAST feed support system

LI Qingwei; LI Hui; JIANG Peng; YAO Rui; PAN Gaofeng

doi:10.16511/j.cnki.qhdxxb.2022.26.027

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Journal of Tsinghua University(Science and Technology) ›› 2022, Vol. 62 ›› Issue (11) : 1758-1763,1779. DOI: 10.16511/j.cnki.qhdxxb.2022.26.027

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Residual bearing capacity of the steel cables and anchorages of the FAST feed support system

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Abstract

The flexible five-hundred-meter aperture spherical radio telescope (FAST) feed support system is a cable-driven parallel manipulator with large spans. The feed cabin is suspended by 6 parallel steel cables and moves slowly over a large range above the reflector through coordinated coiling and uncoiling of the 6 parallel steel cables. The residual bearing capacities of the steel cables and the anchorages that are reaching the design lifespan of 5 years were evaluated using failure tensile tests and tensile fatigue tests for cable and anchorage samples. The tests show that the steel cables and anchorages still have enough residual bearing capacity to continue service after 5 years. This research provides an experimental basis for increasing the service time of steel cables for such monitoring systems.

Key words

FAST feed support system steel cables / breaking tensile test / tensile fatigue test / residual bearing capacity

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LI Qingwei, LI Hui, JIANG Peng, YAO Rui, PAN Gaofeng. Residual bearing capacity of the steel cables and anchorages of the FAST feed support system[J]. Journal of Tsinghua University(Science and Technology). 2022, 62(11): 1758-1763,1779 https://doi.org/10.16511/j.cnki.qhdxxb.2022.26.027

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