Wind and Structures

  • 제9권6호
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  • Pages.441-455
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  • 2006
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Identification of flutter derivatives of bridge decks using stochastic search technique

  • Chen, Ai-Rong (Department of Bridge Engineering, State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Xu, Fu-You (Department of Bridge Engineering, State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Ma, Ru-Jin (Department of Bridge Engineering, State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2005.01.23
  • 심사 : 2006.10.13
  • 발행 : 2006.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

A more applicable optimization model for extracting flutter derivatives of bridge decks is presented, which is suitable for time-varying weights for fitting errors and different lengths of vertical bending and torsional free vibration data. A stochastic search technique for searching the optimal solution of optimization problem is developed, which is more convenient in understanding and programming than the alternate iteration technique, and testified to be a valid and efficient method using two numerical examples. On the basis of the section model test of Sutong Bridge deck, the flutter derivatives are extracted by the stochastic search technique, and compared with the identification results using the modified least-square method. The Empirical Mode Decomposition method is employed to eliminate noise, trends and zero excursion of the collected free vibration data of vertical bending and torsional motion, by which the identification precision of flutter derivatives is improved.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation of China

참고문헌

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피인용 문헌

  1. Comparisons of bridges flutter derivatives and generalized ones vol.3, pp.3, 2009, https://doi.org/10.1007/s11709-009-0042-1
  2. Effect of rain on flutter derivatives of bridge decks vol.11, pp.3, 2008, https://doi.org/10.12989/was.2008.11.3.209
  3. 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
  4. Examination of experimental errors in Scanlan derivatives of a closed-box bridge deck vol.26, pp.4, 2006, https://doi.org/10.12989/was.2018.26.4.231