Flutter analysis of bridges through use of state space method

Tan Van Vu, Ho Yup Lee, Nak Hyun Chun, Seung Taek Oh, Young Min Kim, Hak Eun Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The coupled flutter problem of long-span bridges using complex notation offering simplicity and robustness is addressed in this paper. Firstly, both consistent and lumped aerodynamic matrix of a bridge deck element are presented for the Scanlan's linear self-excited forces included 18 dimensionless aerodynamic derivatives considering vertical bending, pitching torsion as well as lateral bending. Secondly, both the multi-mode and full-mode flutter analysis methods employ the general expression of the linear unsteady aerodynamic forces. The full-mode method adopts the most effective eigensolution technique based on the generalized eigenvalue problem (GEP) formulated in the state space is conducted to find the critical wind speed by an incremental-iterative procedure, in which all vibration modes of the bridge are considered. Several study cases shown that the predictions of the onset flutter given by proposed method are compared with those obtained by existing methods. Both lumped formulation in terms of structural mass and aerodynamic force may provide lower critical velocities at flutter.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
EditorsG. Lombaert, G. Muller, G. De Roeck, G. Degrande
PublisherUniversity of Southampton, Institute of Sound Vibration and Research
Pages3083-3090
Number of pages8
ISBN (Electronic)9789076019314
Publication statusPublished - 2011
Event8th International Conference on Structural Dynamics, EURODYN 2011 - Leuven, Belgium
Duration: 2011 Jul 42011 Jul 6

Publication series

NameProceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011

Other

Other8th International Conference on Structural Dynamics, EURODYN 2011
CountryBelgium
CityLeuven
Period11/7/411/7/6

Keywords

  • Complex eigenvalue analysis
  • Coupled flutter
  • Full order
  • Long-span bridges
  • Multimode
  • State space method

ASJC Scopus subject areas

  • Hardware and Architecture
  • Computer Networks and Communications
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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