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| 基于高阶谱的混凝土材料断裂声发射特征提取 | |
| 引用本文： | 刘国华,黄平捷,杨金泉,刘远,周泽魁.基于高阶谱的混凝土材料断裂声发射特征提取[J].吉林大学学报(工学版),2009,39(3). |
| 作者姓名： | 刘国华 黄平捷 杨金泉 刘远 周泽魁 |
| 作者单位： | 1. 浙江大学,控制科学与工程系,杭州,310027;上海微小卫星工程中心,上海,200050 2. 浙江大学,控制科学与工程系,杭州,310027 3. 浙江大学,建筑工程学院,杭州,310027 |
| 基金项目： | 国家自然科学基金项目(50505045) |
| 摘 要： | 针对混凝土受载时声发射信号的非高斯特性,提出了一种基于高阶谱技术的声发射信号特征提取的新方法。通过对声发射信号的双谱分析,提取了不同载荷阶段下信号的非高斯特征。以信号双谱幅值的平均值作为特征值,对不同载荷下信号偏离高斯分布的程度进行了定量分析,并讨论了不同载荷强度的混凝土声发射信号的双谱特性及非高斯特征。实验结果表明,提取的特征值反映了信号偏离高斯分布的程度,据此可以作为混凝土受载时断裂临界点的判据。通过与声发射事件等常规参数的比较,可以发现高阶谱参数具有更好的敏感性。 |
| 关 键 词： | 信息处理技术 道路工程 混凝土材料 声发射 断裂 高阶谱 |
Feature extraction of concrete material's AE measuring based on high-order spectrum |
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| LIU Guo-hua,HUANG Ping-jie,YANG Jin-quan,LIU Yuan,ZHOU Ze-kui.Feature extraction of concrete material's AE measuring based on high-order spectrum[J].Journal of Jilin University:Eng and Technol Ed,2009,39(3). | |
| Authors: | LIU Guo-hua HUANG Ping-jie YANG Jin-quan LIU Yuan ZHOU Ze-kui |
| Affiliation: | 1.Department of Control Science and Engineering;Zhejiang University;Hangzhou 310027;China;2.Shanghai Engineering Center for Microsatellites;Shanghai 200050;3.College of Civil Engineering and Architecture;China |
| Abstract: | A new method based on higher-order spectrum was proposed to analyze the differential AE signal in this study on the non-Gaussian characteristics of the differentia1 load of concrete.The non-Gaussian characteristics of differential AE signal of different load were extracted by using bispeetral method.The average bispectral magnitude of differential AE signal was taken as an eigenvalue for the quantitative analysis of the deviation degree from normality.Meanwhile,the signal bispectral features and non-Gaussia... |
| Keywords: | information processing technology road engineering concrete material AE(Acoustic Emission) fracture high-order spectrum |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |