| HHT变换在桥梁损伤诊断中的应用 |
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| 引用本文： | 叶贵如,徐欣.HHT变换在桥梁损伤诊断中的应用[J].公路交通科技,2009,26(9). |
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| 作者姓名： | 叶贵如 徐欣 |
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| 作者单位： | 浙江大学,土木工程系,浙江,杭州,310058 |
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| 摘 要： | 将HHT引入国道104发生严重火灾的桥梁的损伤诊断,通过对提取的响应信号进行HHT分析判定出该桥第4跨发生损伤,与实测结果相吻合,证明了该方法在桥梁健康监测方面应用的可行性,同时与FFT计算结果进行了对比,可以发现通过HHT分析后得到的Hilbert谱能够清晰的反映出结构振动能量随振动频率和时间的分布情况,而且整个过程都是自适应的,优于FFT,同时,HHT可以比FFT更清晰的判断桥梁结构动力响应的频谱特性.
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| 关 键 词： | 桥梁工程 健康监测 信号处理 |
Appliance of Hilbert-Huang Transform in Bridge Health Monitoring |
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| YE Guiru,XU Xin.Appliance of Hilbert-Huang Transform in Bridge Health Monitoring[J].Journal of Highway and Transportation Research and Development,2009,26(9). |
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| Authors: | YE Guiru XU Xin |
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| Institution: | Department of Civil engineering;Zhejiang University;Hangzhou Zhejiang 310058;China |
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| Abstract: | The Hilbert-Huang Transform(HHT) method was introduced for damage detection of a bridge after fire accident on national trunk No.104.By analysing the extracted response signals using HHT method,it is identified that the injury occurred on the fourth span,which is in line with the measured result.It is shown that the presented method is feasible in bridge health monitoring.Compared with the calculation result of FFT method,it is shown that(1) the Hilbert spectrum from HHT method can clearly reflect the distr... |
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| Keywords: | HHT EMD |
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