| 钢筋混凝土梁损伤的小波包识别方法 |
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| 引用本文： | 任宜春,张杰峰,刘哲峰.钢筋混凝土梁损伤的小波包识别方法[J].振动．测试与诊断,2011,31(5):605-609. |
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| 作者姓名： | 任宜春 张杰峰 刘哲峰 |
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| 作者单位： | 1. 长沙理工大学土建学院,长沙,410114
2. 长沙市中规建设设计公司,长沙,410007 |
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| 基金项目： | 国家自然科学基金资助项目，湖南省科技计划资助项目 |
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| 摘 要： | 基于小波包能量特征向量的损伤识别是一种对损伤非常敏感的方法.为了更有效地选择特征频带,从频带分解的角度分析了基于小波包分解能量特征向量的结构损伤识别方法.将结构响应信号进行小波包分解,提取各频带的能量.通过分析结构响应频率和小波包分解各频带频率范围,选取信号主要频率所在频带及其相邻频带的能量构成特征向量.当信号频率有微小改变时,特征能量向量的变化远远大于信号频率的变化.当结构出现损伤时,脉冲激励下其动力响应信号的频率有所降低,因此可以通过特征能量向量的变化来识别损伤.通过一根钢筋混凝土梁的试验验证了该方法的有效性.
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| 关 键 词： | 损伤识别 小波包分解 特征能量向量 钢筋混凝土梁 |
Damage Identification of Reinforced Concrete Beam Based on Wavelet Packet |
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| Ren Yichun,Zhang Jiefeng,Liu Zhefeng.Damage Identification of Reinforced Concrete Beam Based on Wavelet Packet[J].Journal of Vibration,Measurement & Diagnosis,2011,31(5):605-609. |
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| Authors: | Ren Yichun Zhang Jiefeng Liu Zhefeng |
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| Affiliation: | Ren Yichun1,Zhang Jiefeng2,Liu Zhefeng1(1School of Civil Engineering and Architecture,Changsha University of Science and Technology Changsha,410114,China)(2Changsha Zhonggui Design of Construction Company Changsha,410007,China) |
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| Abstract: | The method for damage identification based on wavelet packet component energy is sensitive to structural damage.In order to select the characteristic frequency band more efficiently,the method in the point of frequency band decomposition of wavelet packet transform is analyzed.The structure vibration response is transformed by wavelet packet and the component energies are calculated.The frequency of the response and the range of each frequency band are analyzed. The frequency band,in which the main frequenc... |
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| Keywords: | damage detection wavelet packet decomposition characteristic component energy reinforced concrete beam |
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