| 结构小阻尼测量的频域内幅值跟踪方法研究 |
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| 引用本文： | 赵志高,黄其柏. 结构小阻尼测量的频域内幅值跟踪方法研究[J]. 华中科技大学学报(自然科学版), 2001, 29(6): 71-73 |
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| 作者姓名： | 赵志高 黄其柏 |
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| 作者单位： | 华中科技大学机械科学与工程学院 |
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| 基金项目： | 国家“九五”攀登计划资助项目 (PD95 2 190 9) |
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| 摘 要： | 分析了频域内幅值跟踪法的基本原理，提出了用频域内幅值跟踪法求结构小阻尼的一种有效方法，通过将时域内衰减信号为有限段。并将每一段时域信号作傅立叶变换，再跟踪其特定谱线或某一频带内能量的衰减，求出频域内结构振响应幅值及频带内能量衰减60dB的时间T60，从而求出模态阻尼损耗因子的频带阻尼损耗因子。
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| 关 键 词： | 幅值跟踪 模态阻尼 频带阻尼 损耗因子 结构阻尼 阻尼测量 衰减时间 |
| 文章编号： | 1000-8616(2001)06-0071-03 |
| 修稿时间： | 2001-01-17 |
An Approach of Light Damping Structure Measurement by Amplitude Tracking in Frequency Domain |
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| Zhao Zhigao Huang Qibai Postgraduate, College of Mech. Sci. , Eng.,HUST,Wuhan ,China.. An Approach of Light Damping Structure Measurement by Amplitude Tracking in Frequency Domain[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2001, 29(6): 71-73 |
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| Authors: | Zhao Zhigao Huang Qibai Postgraduate College of Mech. Sci. & Eng. HUST Wuhan China. |
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| Affiliation: | Zhao Zhigao Huang Qibai Postgraduate, College of Mech. Sci. & Eng.,HUST,Wuhan 430074,China. |
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| Abstract: | The basic theory of amplitude tracking in frequency domain and a valid method accurately used to measure the light damping loss factor of structure are presented. By subdividing the decay time history into limited records, one can make Fourier Transformation to every record, track the decay of specific spectral line or band energy and determine the T 60 of response amplitude of structure vibration and band energy. Thus modal and band damping loss factor can be determined. |
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| Keywords: | amplitude tracking modal damping band damping loss factor |
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