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FAST反射面支承結(jié)構(gòu)的索網(wǎng)疲勞性能研究
丁 磊1，郭正興2，羅 斌2
摘 要

 

（1蘇州設(shè)計(jì)研究院股份有限公司，蘇州 215021；2東南大學(xué)土木工程學(xué)院，南京 210096）
 
 
[摘要]FAST（Five-hundred-meter Aperture Spherical Telescope）是一個(gè)500m直徑的巨型大跨度空間結(jié)構(gòu)。通過促動(dòng)器拖動(dòng)下拉索來控制主索節(jié)點(diǎn)的位置，實(shí)現(xiàn)望遠(yuǎn)鏡主動(dòng)變位，其實(shí)質(zhì)是一種特殊、長(zhǎng)期、高應(yīng)力幅的往復(fù)疲勞荷載。在30年的運(yùn)行期間內(nèi)，預(yù)計(jì)總共有至少數(shù)十萬次的觀測(cè)，主索網(wǎng)的疲勞應(yīng)力幅為470MPa?；谝陨纤枷氩⒔Y(jié)合FAST的功能要求和特點(diǎn)，對(duì)FAST主動(dòng)反射面整體支承結(jié)構(gòu)的索網(wǎng)進(jìn)行了完整系統(tǒng)的疲勞統(tǒng)計(jì)分析。
[關(guān)鍵詞] FAST;主動(dòng)反射面;主動(dòng)變位;疲勞統(tǒng)計(jì)
中圖分類號(hào)：  TU393      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2013)S1-0362-05
 
Research on cable-net’s fatigue performance of fast reflector’s supporting structure
Ding Lei1, Guo Zhengxing2, Luo Bin2
(1Suzhou Institute of Architectural Design Co., Ltd., Suzhou 215021, China; 2 College of Civil Engineering, Southeast University, Nanjing 210096, China)
 
Abstract: FAST（Five-hundred-meter Aperture Spherical Telescope）, is a giant long-span space structure with five-hundred-meter aperture.For producing active displacements in the telescope, actuators drag the down-cables to control the position of cable-net's nodes, and its essence is a kind of special, long-term, high stress amplitude of reciprocating fatigue load.  After 30 years of the operation period, it is expected to have at least hundreds of thousands of times in total observations,and the cable-net’s fatigue stress amplitude is 470MPa.Based on the above ideas, combining with the functional requirements and features of FAST, this paper is to scientifically analyse the cable-net's fatigue of the FAST active reflector's whole supporting structure.
Keywords: FAST; active reflector; active displacement; fatigue statistics

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