FAST主动反射面支承结构安全预警系统研究与应用  

Ivestigation and application of early-warning system for safety of support structure for active reflector of FAST

作　　者：范峰[1] 王化杰[1] 钱宏亮[1] 金晓飞[1] 陈明[1] 沈世钊[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《建筑结构学报》2010年第12期24-31,共8页Journal of Building Structures

基　　金：国家自然科学基金跨学科交叉重点项目(10435020);国家"十一五"科技支撑项目(2006BAJ01B02)

摘　　要：研究了世界最大单口径射电望远镜FAST支承结构健康监测系统的安全预警功能。结合监测内容和预警分级原则制订了预警设置的总体框架,根据设计规范和环境荷载记录资料设置环境荷载预警参数,以构件安全和望远镜工作精度为控制目标,确定结构响应预警参数设置依据,提出单点张拉法对节点位移预警参数进行研究,运用LABVIEW平台开发了FAST支承结构健康监测安全预警系统,实现了预警参数嵌入及可视化控制的目标。最终在直径30m的FAST模型索网变位试验中的成功应用表明,该安全预警系统实现了FAST支承结构健康监测在线预警功能,可为将来FAST支承结构建造和正常运行提供重要保障。FAST（Five-hundred-meter Aperture Spherical Telescope） is the largest single-caliber radio telescope in the world.This paper investigated the early-warning function of health monitoring system for FAST support structure.The general frame of early-warning function was designed based on the monitoring targets and the early-warning graded grades.The early-warning parameter of environmental loads was obtained from design code and local environmental loads history record.The early-warning parameter of structural response was determined by considering the structural safety and the working precision of FAST.Moreover,the single-point-tension method was suggested to investigate the early-warning parameter of node displacement.The early-warning system was developed,in which the parameter was embedded and the early-warning aim of visualization control was realized,as a result of successful exploitation of earlywarning system in health monitoring for FAST support structure on the platform of LABVIEW.Finally,successful application of the early-warning system in the tension experiment on the 30m-model of FAST cable-net structure shows that the early-warning system so developed works well to perform the on-line early-warning for FAST,the safety of FAST support structure in both the construction period and the service life and thus be guaranteed in future.

关 键 词：FAST支承结构 健康监测 单点张拉法 预警 

分 类 号：TU393.303[建筑科学—结构工程]