作　　者： ; ; ; ; ;

机构地区： 中山大学工学院应用力学与工程系

出　　处： 《振动与冲击》 2011年第7期5-9,共5页

摘　　要： 在结构健康监测领域,基于数码摄像的图像处理技术作为一种新的结构振动监测方法正受到广泛关注。以主结构建成后的广州新电视塔为研究背景,利用工业数码摄像机对其在一般风荷载作用下的动态特性进行监测试验,并与GPS和加速度计同时测量。数据分析结果表明,利用数码摄像系统获得的塔顶动位移时程曲线与GPS获得的动位移曲线吻合得较好;利用数码摄像技术能够准确的识别高耸结构的低阶振动频率,其获得的结构一阶振动频率,与GPS、加速度计识别结果以及有限元分析结果吻合得很好。研究结果表明,在高耸结构的健康监测中,应用数码摄像技术进行结构动态特性监测是一种有效的新方法。 In field of structural health monitoring,an image processing technology based on digital camera fechnology attracts people＇s attention as a new technique of structure vibration monitoring.Taking Guangzhou New TV Tower as the research background,an industrial digital camera GPS and accelerometers were used to monitor the dynamic characteristics of the tower.The data analysis showed that the dynamic displacement time history of the tower tip obtained from the digital camera system matches well with that obtained from GPS;the former can be used to identify the lower natural frequencies;the first natural frequency obtained from the digital camera system matches well with those obtained from GPS,accelerometers and finite element analysis（FEA）.The research results showed that application of digital camera technology in dynamic characteristics monitoring of a highrise structure is an effective new technique in structural health monitoring.

关 键 词： 数码摄像技术 高耸结构 结构健康监测 动态特性

领　　域： [建筑科学]