Modal parameters identification of light rail bridges
Modal parameters identification of light rail bridges
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轻轨桥梁模态参数识别
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
D. R. Widarda
中科院分区：
文献类型：
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作者：
E. Zulkifli;D. R. Widarda
结构健康监测系统（SHMS）的重要方面之一是结构的初始条件。本文研究了轻轨列车（LRT）桥梁正式运营前的初始条件。有四座桥梁需要评估，其中三座简支桥和一座连续桥。数据测量使用三轴加速度计 EZDYN，以列车组作为动态加载源。模态参数通过时域工作模态分析（OMA）获得。对三种方法进行了仿真，即ARMA、ITD和SSI。所应用的数据处理表明，对于固有频率和振动模式，所有三种方法都给出了令人满意的结果，并且相互证实。
One of important aspect in Structural Health Monitoring System (SHMS) is the initial condition of the structure. This paper studies the initial condition of light rail train (LRT) bridges before officially operated. There are four bridges to be evaluated, consists of three simple supported bridges and one continuous bridge. Data measurement was using tri-axial accelerometer EZDYN with a train-set as the dynamic loading source. The modal parameters are obtained by means of operating modal analysis (OMA) in time domain. Three methods are simulated, that are ARMA, ITD and SSI. The data processing applied shows that all three methods give satisfactory results that confirm each other, for both natural frequencies and vibration modes.