| HHT法的基本原理及其应用探讨 |
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| 引用本文： | 张丽娜,李凤臣,彭必全,袁青竹,郑喜亮.HHT法的基本原理及其应用探讨[J].华东地质学院学报,2013(4):419-423. |
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| 作者姓名： | 张丽娜 李凤臣 彭必全 袁青竹 郑喜亮 |
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| 作者单位： | [1]东华理工大学建筑工程学院,江西南昌330013 [2]中冶赛迪工程技术股份有限公司,重庆400013 |
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| 基金项目： | 江西省教育厅科技项目（GJJ12395）;江西省自然科学基金项目（20122BAB216004,20122BAB212010）;东华理工大学硕博启动基金（DHBK1017）;东华理工大学校长基金（DHXK1128）;东华理工大学实验技术开发项目 |
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| 摘 要： | 以Timoshenko单跨梁为研究对象，采用回转射线矩阵法进行动力响应计算，针对Timoshenko梁的瞬态响应信号为非平稳信号，采用基于Hilbert—Huang变换原理的信号时频分析，并与FFT的处理结果进行对比分析。结果表明，HHT方法比Frr法更适合非平稳信号的分析和处理，同时，HHT方法不仅可以将瞬态信号中低频和高频部分分离出来，还可以通过Hilbert谱展示信号能量在时频域内的分布，更为深入的了解信号的本质。
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| 关 键 词： | Timoshenko粱理论 HHT 瞬态响应 信号处理 |
The Basic Principle of HHT Method and Application Discussion |
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| ZHANG Li-na,LI Feng-chen,PENG Bi-quan,YUAN Qing-zhu,ZHENG Xi-liang.The Basic Principle of HHT Method and Application Discussion[J].Journal of East China Geological Institute,2013(4):419-423. |
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| Authors: | ZHANG Li-na LI Feng-chen PENG Bi-quan YUAN Qing-zhu ZHENG Xi-liang |
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| Institution: | 2 ( 1. College of Civil Engineering and Architecture, East China Institute of Technology, Nanchang, JX 330013, China; 2. CISDI Engineering Co. , Ltd, CQ 400013, China) |
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| Abstract: | Dynamic response of singlespan Timoshenko beam is calculated by rotaryray matrix method. Consider ing that transient response signal of Timoshenko beam is nonstationary signal timefrequency analysis based on HilbertHuang transformation principle is performed and is compared with the analysis based on FFF. The results showed that HHT method was more appropriate for analysis and process of nonstationary signal than FFT method.＇ HHT method not only might separate lowfrequency and highfrequency component from transient signal, but also might reflect energy distribution in timefrequency domain by Hilbert spectrum. So the nature of signal was com prehended further. |
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| Keywords: | theory of Timoshenko beam HHT transient response signal processing |
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