某悬索桥振动特性现场测试及数值模拟

英文篇名：Field measurement and numerical simulation on dynamic properties of a cable suspension bridge
中文刊名：世界地震工程
英文刊名：World Earthquake Engineering
作者：郭迅 ; 李洪涛 ; 王金国
英文作者：GUO Xun1 ; LI Hongtao1 ; WANG Jinguo2(1.Institute of Engineering Mechanics ; China Earthquake Administration ; Harbin 150080 ; China ; 2.Design and Research Institute of Daqing Oilfield ; Daqing 163700 ; China)
中文关键词：悬索结构 ; 模态测试 ; 健康诊断 ; 对称信号法
英文关键词：suspension structure ; mode measurement ; health diagnosis ; symmetrical signal method
出版日期：2008-09-15
机构：中国地震局工程力学研究所;大庆油田建设设计研究院;
年：2008
期：03
出版单位：世界地震工程

摘要

振动频率是结构的固有特性,由结构材料和构造所决定,是结构设计阶段验算的重要参数。结构现场振动频率的测试结果既可用来校核设计质量也可作为结构健康诊断的重要依据。通过脉动和人工激励,获得了某悬索跨越结构整体前三阶振动频率,同时依据结构健康诊断的对称信号法,测试了主索、锚固索等局部结构的振动频率。测试结果与模型实验和有限元分析结果接近,并且证明对称的局部结构具有对称的振动频率。
Vibration frequencies are inherent characteristics of a structure,they are determined by structural material and structural integrity.Frequencies of the structure are important parameters to be check during designing stage,they can be used for the checking of structural design quality and structural health diagnosis.A suspension structure is measured by employing microtremor method and artificial exciting method,the first 3 global vibration frequencies are obtained,local vibration frequencies of main cables and anchoring cables are measured by using symmetrical signal method.Measured results agree well with those obtained by model test and finite element method;symmetrical components are proved to be taken the similar vibration frequencies.

引文

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