| 用随机减量技术及ITD法识别工作模态参数 |
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| 引用本文： | 刘齐茂.用随机减量技术及ITD法识别工作模态参数[J].广西工学院学报,2002,13(4):23-26. |
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| 作者姓名： | 刘齐茂 |
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| 作者单位： | 东南大学土木学院工程力学系,江苏,南京,210018;广西工学院汽车系,广西,柳州,545006 |
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| 摘 要： | 在许多情况下环境激励是无法测量的，假设环境对振动系统的激励是均值为零的白噪声，用随机减量技术将系统的自由振动信号从随机响应信号中分离出来，然后再用ITD法识别系统的模态参数，整个过程均在时域内进行，避免了时频转换中出现的“谱泄漏”等现象。
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| 关 键 词： | ITD 环境激励 模态分析 参数识别 随机减量技术 随机振动 |
| 文章编号： | 1004-6410(2002)04-0023-04 |
| 修稿时间： | 2002年9月12日 |
Operating modal parameter identification by random decrement technique and ibrahim time domain |
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| LIU Qi,mao.Operating modal parameter identification by random decrement technique and ibrahim time domain[J].Journal of Guangxi University of Technology,2002,13(4):23-26. |
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| Authors: | LIU Qi mao |
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| Affiliation: | LIU Qi mao 1,2 |
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| Abstract: | The embient excitation can't be measured in many cases The embient excitation to the vibration system is considerd as white noise with naught of expectation Free vibration signal of the system is separated from random response signal by random decrement technique And then the modal parameters of the system are identified by ibrahim time domain The total process is done in time domain and so the spectrum leakage is avoided from time domain to frequency domain |
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| Keywords: | embient excitation modal analysis parameter identification random decrement technique random vibration |
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