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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.59 No.1
- 발행연도
- 2016.1
- 수록면
- 187 - 207 (21page)
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초록· 키워드
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Practical ambient excitations of engineering structures usually do not comply with the stationary-white-noise assumption in traditional operational modal analysis methods due to heavy traffic, wind guests, and other disturbances. In order to eliminate spurious modes induced by non-white noise inputs, the improved stochastic subspace identification based on a delay index is proposed in this paper for a representative kind of stationary non-white noise ambient excitations, which have nonzero autocorrelation values near the vertical axis. It relaxes the stationary-white-noise assumption of inputs by avoiding corresponding unqualified elements in the Hankel matrix. Details of the improved stochastic subspace identification algorithms and determination of the delay index are discussed. Numerical simulations on a four-story frame and laboratory vibration experiments on a simply supported beam have demonstrated the accuracy and reliability of the proposed method in eliminating spurious modes under non-white noise ambient excitations.
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참고문헌 (29)
참고문헌 신청
Araújo, I.G. / 2014 / Operational modal analysis using SVD of power spectral density transmissibility matrices / Mech. Syst. Signal Pr 46(1):129~145
Brincker, R. / 2001 / Modal identification of output-only systems using frequency domain decomposition / Smart Mater. Struct 10(3):441~445
Cooper, J.E. / 1995 / Model parameter identification using an unknown coloured random input / Mech. Syst. Signal Pr 9(6):685~695
De Roeck, G. / 2000 / Benchmark study on system identification through ambient vibration measurements / Proceedings of the 18th International Modal Analysis Conference (IMAC XVIII)
Devriendt, C. / 2009 / Operational modal analysis in the presence of harmonic excitations by the use of transmissibility measurements / Mech. Syst. Signal Pr 23(3):621~635
Brincker, R. / 2001 / Modal identification of output-only systems using frequency domain decomposition / Smart Mater. Struct 10(3):441~445
Cooper, J.E. / 1995 / Model parameter identification using an unknown coloured random input / Mech. Syst. Signal Pr 9(6):685~695
De Roeck, G. / 2000 / Benchmark study on system identification through ambient vibration measurements / Proceedings of the 18th International Modal Analysis Conference (IMAC XVIII)
Devriendt, C. / 2009 / Operational modal analysis in the presence of harmonic excitations by the use of transmissibility measurements / Mech. Syst. Signal Pr 23(3):621~635
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