| 基于小波包变换的梁体损伤识别 |
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| 引用本文： | 韩建刚,任伟新,孙增寿. 基于小波包变换的梁体损伤识别[J]. 振动、测试与诊断, 2006, 26(1): 5-10 |
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| 作者姓名： | 韩建刚 任伟新 孙增寿 |
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| 作者单位： | 1. 海南大学土木工程系,海口,570228
2. 福州大学土木建筑工程学院,福州,350002 |
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| 基金项目： | 中国科学院资助项目;教育部留学基金 |
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| 摘 要： | 由于小波包变换在分析非平稳信号方面较傅立叶变换更为有效，提出了基于小波包变换的能量变化率指标进行损伤识别的方法。首先，将得到的结构响应信号进行小波包分解，然后通过小波包能量变化率指标来进行损伤定位。通过3种不同损伤工况的梁体室内试验证明．损伤指标可以准确地识别损伤位置。
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| 关 键 词： | 损伤识别 小波包变换 梁 能量变化率指标 |
| 收稿时间： | 2004-11-08 |
| 修稿时间： | 2004-11-082004-12-17 |
Damage Detection of Beams Based on Wavelet Packet Analysis |
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| Han Jiangang,Ren Weixin,Sun Zengshou. Damage Detection of Beams Based on Wavelet Packet Analysis[J]. Journal of Vibration,Measurement & Diagnosis, 2006, 26(1): 5-10 |
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| Authors: | Han Jiangang Ren Weixin Sun Zengshou |
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| Abstract: | In this study, a damage detection index, the wavelet packet energy rate index, is proposed for detecting the structure damage. Dynamic signals measured from experiment beams are first decomposed into wavelet packet components, then the wavelet energy rate index is computed and used to detect location of damage. Three kinds of damage locations are designed to prove the validity of energies index in experiments with impact excitations. The results show that the WPT-based energies rate index is sensitive to structural damages. |
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| Keywords: | damage detection wavelet packet transform beam energy rate index |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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