基于hht变换的非线性结构损伤识别分析

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1、哈尔滨工业大学工学硕士学位论文instantaneousenergyofthefirstIMFareusedasthedamagecharacteristicfactors.Theresultsshowthatchoosingappropriatesignalsaccordingtothesymmetryofthestructures,theinstantaneousfrequencyandinstantaneousenergyofthefirstIMFcanbeusedtoidentifynotonlythepresen

2、ceofdamagebutalsotheseverityofdamage.Keywords:nonlinearsystem,structuraldamageidentification,ensembleempiricalmodaldecomposition,Hilbert-HuangTransform,instantaneousfrequency,instantaneousenergy-III-万方数据哈尔滨工业大学工学硕士学位论文目录摘要..........................................

3、................................................................................IABSTRACT................................................................................................................II第1章绪论........................................................

4、.................................................11.1课题背景及研究的目的和意义.................................................................11.2非线性系统识别的研究现状.....................................................................21.2.1非线性指示函数...................................

5、....................................................21.2.2非线性程度识别.......................................................................................41.2.3非线性位置识别.......................................................................................41.2.4非线性类型识

6、别.......................................................................................51.3非线性系统识别方法................................................................................51.3.1时域类分析方法......................................................................

7、.................51.3.2频域类分析方法.....................................................................................121.3.3时频类分析方法.....................................................................................141.3.4基于混沌类非线性分析方法...............................

8、..................................151.4非平稳信号处理方法研究现状...............................................................161.5希尔伯特-黄变换研究现状....................