| 基于HHT的非线性结构系统识别研究 |
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| 引用本文： | 黄天立,楼梦麟.基于HHT的非线性结构系统识别研究[J].地震工程与工程振动,2006,26(3):80-83. |
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| 作者姓名： | 黄天立 楼梦麟 |
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| 作者单位： | 同济大学,土木工程防灾国家重点实验室,上海,200092 |
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| 摘 要： | 本文研究基于HHT的多自由度非线性结构系统识别方法。首先通过EMD分解得到结构的非线性模态(NNM),然后对非线性模态进行H ilbert分析,识别出结构的瞬时特征参数(瞬时振幅、瞬时固有频率等),进而由各参数间关系识别出非线性结构的类型。最后通过一个具有非线性刚度的两自由度剪切型建筑结构的数值模拟验证了该方法的有效性。
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| 关 键 词： | 系统识别 非线性模态 HHT |
| 文章编号： | 1000-1301（2006）03-0080-04 |
| 收稿时间： | 2005-12-20 |
| 修稿时间： | 2005-12-202006-03-26 |
System identification of nonlinear structures based on HHT |
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| Huang Tianli,Lou Menglin.System identification of nonlinear structures based on HHT[J].Earthquake Engineering and Engineering Vibration,2006,26(3):80-83. |
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| Authors: | Huang Tianli Lou Menglin |
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| Affiliation: | State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092 ,China |
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| Abstract: | A system identification method based on HHT is proposed to identify nonlinear MDOF structures.Firstly,the nonlinear normal modes(NNM) of the structure are obtained through the empirical mode decomposition(EMD).Then the HT is applied to analyze the NNM of the structure and the structural instantaneous characteristics(including the instantaneous amplitude and the instantaneous frequency etc.) were identified.Based on the relationship among these characteristics,the nonlinear type of the structure was identified.At last,the numerical simulation of a two DOF building model with nonlinear stiffness is used for validation. |
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| Keywords: | system identification nonlinear normal modes Hilbert-Huang Transform |
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