| 基于HHT的混凝土损伤AE信号分析新方法 |
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| 引用本文： | 刘红光,骆英,赵国旗,李忠芳.基于HHT的混凝土损伤AE信号分析新方法[J].防灾减灾工程学报,2007,27(2):187-191. |
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| 作者姓名： | 刘红光 骆英 赵国旗 李忠芳 |
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| 作者单位： | 江苏大学理学院,江苏,镇江,212013 |
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| 基金项目： | 国家自然科学基金资助项目(50375069)，江苏省“六大人才高峰”计划项目资助 |
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| 摘 要： | 介绍了HHT这一非线性、非平稳信号的处理方法。针对混凝土材料损伤所产生的声发射信号复杂的特点,提出了基于HHT的分析混凝土材料中产生的声发射信号的新方法,借此分析了从预应力混凝土梁在三点弯曲载荷下的破坏实验中拾取的实际AE信号,获得了该损伤信号的Hilbert谱。通过与小波分析结果的比较,显示出该方法具有处理精度高、自适应性强的特点,能有效地提取声发射信号中损伤成分的主要特征,为AE信号处理提供了一种新的途径。
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| 关 键 词： | 希尔伯特黄变换(HHT) 声发射(AE)信号 混凝土 经验模态分解 信号处理 |
| 文章编号： | 1672-2132（2007）02-0187-05 |
| 修稿时间： | 2006-09-302006-10-26 |
A New Method for Analyzing Damage AE Signals in Concrete Based on Hilbert-Huang Transform |
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| LIU Hong-guang,LUO Ying,ZHAO Guo-qi,LI Zhong-fang.A New Method for Analyzing Damage AE Signals in Concrete Based on Hilbert-Huang Transform[J].Journal of Disaster Prevent and Mitigation Eng,2007,27(2):187-191. |
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| Authors: | LIU Hong-guang LUO Ying ZHAO Guo-qi LI Zhong-fang |
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| Institution: | Faculty of Science, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | Hilbert-Huang transform is a new method to deal with non-linear and non-stationary data.A new signal processing method based on Hilbert-Huang transform is proposed to analyze AE signals obtained in concrete considering the complexity of the AE signals produced in concrete.The real AE signals are studied acquired from the testing of prestressed beam subjected to three-points-bending loadings until failure.Comparisons are made between Hilbert spectrum and the same result from wavelet transform method.The results have shown that the proposed method has generally high accuracy and strong self-adaptability,with which the main characteristics of the AE signal can be acquired.The method provides a new approach to AE signal processing. |
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| Keywords: | Hilbert-Huang transform AE signals concrete empirical mode decomposition(EMD) signal processing |
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