FAST索网张拉过程模拟分析及误差控制  

Simulation and error control of tensioning process for FAST cable-net structure

作　　者：罗平杰 李亚东[1] 张国强 姚昌荣[1] LUO Ping-jie LI Ya-dong ZHANG Guo-qiang YAO Chang-rong(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China Liuzhou OVM Engineering Co. , LTD, Liuzhou 545005, China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]柳州欧维姆工程有限公司,广西柳州545005

出　　处：《空间结构》2017年第3期36-40,共5页Spatial Structures

基　　金：国家自然科学基金项目(51378430)

摘　　要：500m口径球面射电望远镜(FAST)采用柔性索网作为反射面的支承结构,柔性索网结构的张拉过程模拟分析对于张拉成形阶段具有重要的指导作用.基于非线性有限元理论,针对FAST索网的结构形式和施工方案,提出了索网张拉过程的模拟分析方法.通过计算分析得到了索网在张拉过程中的位移和内力,计算结果验证了张拉方案的可行性.根据张拉过程中索网的内力变化,确定了FAST索网的误差调整方案.调索后,索力的实测值和计算值偏差在10%以内,说明调索效果较好.The Five-hundred-meter Aperture Spherical radio Telescope（FAST）is supported by a flexible cable-net structure.The simulation of tensioning process is very important for shape forming of the cablenet structure.Based on the nonlinear finite element theory,considering the practical structural form and construction method of the FAST,a numerical simulation method is taken to simulate the tensioning process.The displacement and internal force of cable-net structure have been obtained.The simulation results verify the feasibility of the tensioning scheme.According to the change of cable force during the tensioning process,the scheme of error adjustment on the FAST cable-net is obtained.After cable adjustment,the deviation between the calculated values and the measured values is less than 10%,verifying the effectiveness of cable adjustment.

关 键 词：FAST 索网结构 张拉过程 数值模拟 误差 

分 类 号：TU351[建筑科学—结构工程]