Structural Engineering and Mechanics

테크노프레스 (Techno-Press)
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Comparative study on modal identification methods using output-only information

  • Yi, Jin-Hak (Smart Infra-Structure Technology Center, Korea Advanced Institute of Science and Technology) ;
  • Yun, Chung-Bang (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
  • 투고 : 2003.03.12
  • 심사 : 2004.01.07
  • 발행 : 2004.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, several modal identification techniques for output-only structural systems are extensively investigated. The methods considered are the power spectral method, the frequency domain decomposition method, the Ibrahim time domain method, the eigensystem realization algorithm, and the stochastic subspace identification method. Generally, the power spectral method is most widely used in practical area, however, the other methods may give better estimates particularly for the cases with closed modes and/or with large measurement noise. Example analyses were carried out on typical structural systems under three different loading cases, and the identification performances were examined throught the comparisons between the estimates by various methods.

키워드

참고문헌

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