| 小波在结构损伤鉴定中的应用 |
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| 引用本文： | 杨海鸣,杨帆.小波在结构损伤鉴定中的应用[J].武汉理工大学学报(交通科学与工程版),2011(4). |
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| 作者姓名： | 杨海鸣 杨帆 |
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| 作者单位： | 深圳地铁集团有限公司;同济大学结构工程与防灾研究所; |
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| 摘 要： | 为得到信号小波变换后的模峰值点,提出了信号降阶概念,并以悬臂梁为例,说明了有损信号和无损信号之差是对梁结构位移信号的一种有效的降阶方法.提出了利用模极大值分布图判断结构损伤的办法.并以第四类损伤为例进行了算法的演算,说明了利用模极大值分布图来鉴定损伤的方法.从中可以看出,上述探伤方法可以达到工程所要求的最高精度,可以将损伤精确定位到有损结构位移信号的采样节点上,具有较高的工程实用价值.
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| 关 键 词： | 小波 结构损伤 模极大值 奇异性 |
Application of the Wavelet in Structural Damage Identification |
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| Yang Haiming Yang Fan.Application of the Wavelet in Structural Damage Identification[J].journal of wuhan university of technology(transportation science&engineering),2011(4). |
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| Authors: | Yang Haiming Yang Fan |
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| Affiliation: | Yang Haiming1) Yang Fan2)(Shenzhen Metro Corporation,Shenzhen 518026,China)1)(Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China)2) |
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| Abstract: | Based on the relationship between the wavelet transformation and the signal singularity check,several damage types and their corresponding displacement signal singularities are concluded.The inner relationship between the wavelet vanishing moment and the damage type is described,and the selecting method of wavelet vanishing moments with different damage types is given.In order to get the peak value of the signal after the wavelet transformation,the concept of signal deflation is brought out.Taking the canti... |
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| Keywords: | the wavelet structural damage the max module the singularity |
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