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Applied Mathematics and Mechanics (English Edition) ›› 2004, Vol. 25 ›› Issue (8): 957-962.

• 论文 • 上一篇    

THEORETICAL MODEL AND NUMERICAL METHOD ON ONLINE IDENTIFICATION OF DYNAMICAL CHARACTERISTICS OF STRUCTURAL SYSTEM

姚志远, 汪凤泉   

  1. Department of Engineering Mechanics, Southeast University, Nanjing 210096, P. R. China
  • 收稿日期:2002-12-12 修回日期:2004-03-03 出版日期:2004-08-18 发布日期:2004-08-18
  • 基金资助:
    the National Natural Science Foundation of China(59775022)

THEORETICAL MODEL AND NUMERICAL METHOD ON ONLINE IDENTIFICATION OF DYNAMICAL CHARACTERISTICS OF STRUCTURAL SYSTEM

YAO Zhi-yuan, WANG Feng-quan   

  1. Department of Engineering Mechanics, Southeast University, Nanjing 210096, P. R. China
  • Received:2002-12-12 Revised:2004-03-03 Online:2004-08-18 Published:2004-08-18
  • Supported by:
    the National Natural Science Foundation of China(59775022)

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摘要： An online method of identification of dynamic characteristics only using measured ambient response of structural dynamic system is widely focused on.The Ibrahim and ARMA(AutoRegressive Moving Average)methods are basic identification methods.A model on dynamic system suffered by random ambient excitation was researched into, and a subspace decomposition method being different from traditional harmonic retrieval method was introduced.Robustness and effectiveness of this approach on identification of vibration characteristics are demonstrated on numerical experiment.

关键词: modal identification, system identification, structure dynamic system

Abstract: An online method of identification of dynamic characteristics only using measured ambient response of structural dynamic system is widely focused on.The Ibrahim and ARMA(AutoRegressive Moving Average)methods are basic identification methods.A model on dynamic system suffered by random ambient excitation was researched into, and a subspace decomposition method being different from traditional harmonic retrieval method was introduced.Robustness and effectiveness of this approach on identification of vibration characteristics are demonstrated on numerical experiment.

Key words: modal identification, system identification, structure dynamic system

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