Structural Engineering and Mechanics

  • 제14권4호
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  • Pages.491-504
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  • 2002
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A state space method for coupled flutter analysis of long-span bridges

  • Ding, Quanshun (State Key Lab for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Chen, Airong (State Key Lab for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Xiang, Haifan (State Key Lab for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2000.07.17
  • 심사 : 2000.10.29
  • 발행 : 2002.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

A state-space method is proposed to analyze the aerodynamically coupled flutter problems of long-span bridges based on the modal coordinates of structure. The theory about complex modes is applied in this paper. The general governing equation of the system is converted into a complex standard characteristic equation in a state space format, which contains only two variables. The proposed method is a single-parameter searching method about reduced velocity, and it need not choose the participating modes beforehand and has no requirement for the form of structure damping matrix. The information about variations of system characteristics with reduced velocity and wind velocity can be provided. The method is able to find automatically the lowest critical flutter velocity and give relative amplitudes, phases and energy ratios of the participating modes in the flutter motion. Moreover, the flutter analysis of Jiangyin Yangtse suspension bridge with 1385 m main span is performed. The proposed method has proved reliable in its methodology and efficient in its use.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

참고문헌

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피인용 문헌

  1. Full-order and single-parameter searching analysis of coupled flutter instability for long-span bridges vol.44, pp.3, 2017, https://doi.org/10.1139/cjce-2016-0246
  2. On the limit cycles of aeroelastic systems with quadratic nonlinearities vol.30, pp.1, 2008, https://doi.org/10.12989/sem.2008.30.1.067
  3. Flutter analysis of Stonecutters Bridge vol.9, pp.2, 2002, https://doi.org/10.12989/was.2006.9.2.125
  4. Investigation on flutter mechanism of long-span bridges with 2d-3DOF method vol.10, pp.5, 2002, https://doi.org/10.12989/was.2007.10.5.421