HILBERT-HUANG TRANSFORM FOR DAMPING RATIO IDENTIFICATION OF STRUCTURES WITH CLOSELY SPACED MODES OF VIBRATION

机译：Hilbert-Huang变换用于阻尼比近似的振动模式结构的阻尼比识别

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This paper investigates the possibility of using the Hilbert-Huang transform method for modal damping ratios identification of the structure with closely spaced modal frequencies. A 2-story shear building under an impact excitation is studied for a wide range of dynamic properties from well-separated modal frequencies to very closely spaced modal frequencies. The damping ratio identification error by the HHT method as well as FFT method are compared with the theoretical value and then expressed as the function of normalized frequency space. The results show that the HHT method is superior to the FFT method in the identification of damping ratio of the structures with closely spaced modes of vibration. The HHT method seems to be a promising tool for parameter identification of linear structures.

机译：本文研究了使用希尔伯特-黄（Hilbert-Huang）变换方法识别具有紧密间隔模态频率的结构的模态阻尼比的可能性。研究了在冲击激励下的两层剪力建筑物的广泛动态特性，包括模态频率很好分开的模态频率到非常紧密的模态频率。将HHT方法和FFT方法的阻尼比识别误差与理论值进行比较，然后表示为归一化频率空间的函数。结果表明，HHT方法在识别振动模式较近的结构的阻尼比方面优于FFT方法。 HHT方法似乎是用于线性结构参数识别的有前途的工具。

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来源
《International Conference on Advances in Building Technology Vol.2, Dec 4-6, 2002, Hong Kong, China》|2002年|p.1107-1114|共8页
会议地点 Hong Kong(CN);Hong Kong(CN)
作者
J. Chen; Y. L. Xu;
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作者单位

Department of Civil and Structural Engineering, The Hong Kong Polytechnic University Hung Hom, Kowloon, HongKong;

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会议组织
原文格式 PDF
正文语种 eng
中图分类建筑科学;
关键词
system identification; closely spaced modal frequencies; modal damping ratio; the HHT method; the FFT method; random decrement technology;

机译：系统识别;模态频率等距;模态阻尼比; HHT法; FFT法;随机递减技术;

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2. Identification of modal damping ratios of structures with closely spaced modal frequencies [J] . J. Chen, Y. L. Xu Structural Engineering and Mechanics . 2002,第4期

机译：识别具有紧密间隔模态频率的结构的模态阻尼比
3. Approximation of a closely spaced mode subspace by a repeated mode subspace in vibration control of flexible structures [J] . Xu BH, Bao RH Chaos, Solitons and Fractals: Applications in Science and Engineering: An Interdisciplinary Journal of Nonlinear Science . 1997,第10期

机译：柔性结构振动控制中重复模式子空间逼近密集模式子空间
4. HILBERT-HUANG TRANSFORM FOR DAMPING RATIO IDENTIFICATION OF STRUCTURES WITH CLOSELY SPACED MODES OF VIBRATION [C] . J. Chen, Y. L. Xu International conference on advances in building technology . 2002

机译：Hilbert-Huang改造了振动紧密间隔模式的阻尼比识别结构
5. EQUIVALENT CONTINUUM FINITE ELEMENT MODELLING OF PLATE-LIKE SPACE LATTICE STRUCTURES (OPTIMAL, VIBRATIONS, CONTROL). [D] . LAMBERSON, STEVEN EDWARD. 1985

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6. Low Mass-Damping Vortex-Induced Vibrations of a Single Cylinder at Moderate Reynolds Number [O] . Y. Jus, E. Longatte, J.-C. Chassaing, -1

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7. Hilbert-Huang transform for damping ratio identification of structures with closely spaced modes of vibration [O] . Chen J, Xu YL, Li J 2003

机译：Hilbert-Huang变换用于识别振动模式紧密的结构的阻尼比

HILBERT-HUANG TRANSFORM FOR DAMPING RATIO IDENTIFICATION OF STRUCTURES WITH CLOSELY SPACED MODES OF VIBRATION

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