Wind and Structures

  • 제9권2호
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  • Pages.159-178
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  • 2006
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Identification of 18 flutter derivatives by covariance driven stochastic subspace method

  • 투고 : 2005.03.14
  • 심사 : 2006.03.07
  • 발행 : 2006.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

For the slender and flexible cable supported bridges, identification of all the flutter derivatives for the vertical, lateral and torsional motions is essential for its stability investigation. In all, eighteen flutter derivatives may have to be considered, the identification of which using a three degree-of-freedom elastic suspension system has been a challenging task. In this paper, a system identification technique, known as covariance-driven stochastic subspace identification (COV-SSI) technique, has been utilized to extract the flutter derivatives for a typical bridge deck. This method identifies the stochastic state-space model from the covariances of the output-only (stochastic) data. All the eighteen flutter derivatives have been simultaneously extracted from the output response data obtained from wind tunnel test on a 3-DOF elastically suspended bridge deck section-model. Simplicity in model suspension and measurements of only output responses are additional motivating factors for adopting COV-SSI technique. The identified discrete values of flutter derivatives have been approximated by rational functions.

키워드

참고문헌

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  4. Predicting flutter speed of a cable-stayed bridge vol.163, pp.1, 2010, https://doi.org/10.1680/bren.2010.163.1.013
  5. Data-driven stochastic subspace identification of flutter derivatives of bridge decks vol.98, pp.12, 2010, https://doi.org/10.1016/j.jweia.2010.07.003
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  9. Effect of rain on flutter derivatives of bridge decks vol.11, pp.3, 2008, https://doi.org/10.12989/was.2008.11.3.209
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  11. Three-Degree-of-Freedom Coupled Numerical Technique for Extracting 18 Aerodynamic Derivatives of Bridge Decks vol.140, pp.11, 2014, https://doi.org/10.1061/(ASCE)ST.1943-541X.0001009
  12. Continuous Modal Parameter Identification of a Cable-Stayed Bridge Based on Robustious Decomposition and Covariance-Driven Stochastic Subspace Identification vol.40, pp.1, 2016, https://doi.org/10.1007/s40996-016-0008-1
  13. Extraction of bridge aeroelastic parameters by one reference-based stochastic subspace technique vol.14, pp.5, 2006, https://doi.org/10.12989/was.2011.14.5.413
  14. Dynamic Performance of a Slender Truss Bridge Subjected to Extreme Wind and Traffic Loads Considering 18 Flutter Derivatives vol.32, pp.6, 2006, https://doi.org/10.1061/(asce)as.1943-5525.0001068
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