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| 基于改进HHT的结构模态参数识别方法 | |
| 引用本文： | 付春,姜绍飞,牟海东.基于改进HHT的结构模态参数识别方法[J].应用基础与工程科学学报,2011,19(4):583-590. |
| 作者姓名： | 付春 姜绍飞 牟海东 |
| 作者单位： | 1. 福州大学土木工程学院,福建福州350108;辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001 2. 福州大学土木工程学院,福建福州,350108 3. 北京泰克华诚技术信息咨询有限公司,北京,100083 |
| 基金项目： | 国家自然科学基金(5040803350878057); 高等学校博士学科点专项科研基金(20093514110005) |
| 摘 要： | 针对HHT方法中经验模态分解(EMD)过程容易出现模态混叠、虚假模态和端点效应的问题,提出了改进的HHT方法.首先利用带通滤波对原始信号进行预处理,得到一组窄带频率信号之和；接着进行EMD过程,得到若干个本征模函数(IMF),根据IMFs和原信号的相关系数来判定其是否是真正的IMFs;然后运用随机减量技术(RDT)和希... |
| 关 键 词： | 模态参数识别 改进的Hilbert-Huang变换 经验模态分解 随机减量技术 |
Structural Modal Parameters Indentification Method Based on Improved Hilbert-Huang Transform |
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| FU Chun,JIANG ShaoFei,MU Haidong.Structural Modal Parameters Indentification Method Based on Improved Hilbert-Huang Transform[J].Journal of Basic Science and Engineering,2011,19(4):583-590. | |
| Authors: | FU Chun JIANG ShaoFei MU Haidong |
| Institution: | FU Chun1,2,JIANG ShaoFei1,MU Haidong3 (1.College of Civil Engineering,Fuzhou University,Fuzhou 350108,China,2.College of Petroleum Engineering,Liao Ning Shihua University,Fushun 113001,3.Beijing Tai-ke Hua-cheng Technique and Information Consultation Company,Beijing 100083,China) |
| Abstract: | To solve existing problems of Hilbert-Huang transform(HHT),such as mode aliasing,false mode and end effect problems in the course of empirical mode decomposition(EMD),an improved HHT method was proposed in this paper.At first,a band-pass filter method is used to pre-process measured primary response signals,the sum of narrow-band signals is obtained.Then a series of Intrinsic Mode Functions(IMFs)are separated from the processed signals by using EMD.The real IMFs are determined by the correlative coefficient... |
| Keywords: | modal parameter identification improved Hilbert-Huang Transform empirical mode decomposition random decrement technique |
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