FAST馈源支撑钢索及舱索连接锚具役后剩余承载力研究  

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

作　　者：李庆伟[1,2] 李辉[1,2] 姜鹏[1,2] 姚蕊[1,2] 潘高峰[1,2] LI Qingwei;LI Hui;JIANG Peng;YAO Rui;PAN Gaofeng(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of FAST,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]中国科学院国家天文台,北京100101 [2]中国科学院FAST重点实验室,北京100101

出　　处：《清华大学学报（自然科学版）》2022年第11期1758-1763,1779,共7页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金面上项目(11973006,11973062);中国科学院西部青年学者(A类)项目。

摘　　要：500m口径球面射电望远镜(five-hundred-meter aperture spherical radio telescope,FAST)的馈源支撑系统是一个跨度巨大的柔索牵引并联机构,馈源舱由6根并联的钢索悬挂于空中,并随着6根钢索的同步收放在反射面上方大范围内缓慢运动。为研究到达服役年限后FAST馈源支撑钢索及舱索连接锚具的剩余承载力,该文对达到5年设计使用年限后的FAST馈源支撑钢索及舱索连接锚具进行了破断拉伸强度、拉伸疲劳试验。结果表明:在运行5年后,馈源支撑钢索及舱索连接锚具仍有足够的剩余承载力继续服役。该研究为今后馈源支撑钢索在适当的监测手段辅助下增加服役时间提供了试验依据。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 6parallel steel cables.The residual bearing capacities of the steel cables and the anchorages that are reaching the design lifespan of 5years 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 5years.This research provides an experimental basis for increasing the service time of steel cables for such monitoring systems.

关 键 词：FAST馈源支撑钢索 破断拉伸试验 拉伸疲劳试验 剩余承载力 

分 类 号：TP311.51[自动化与计算机技术—计算机软件与理论]