Comparative and sensitivity study of flutter derivatives of selected bridge deck sections, Part 1: Analysis of inter-laboratory experimental data

2009 ◽  
Vol 31 (1) ◽  
pp. 158-169 ◽  
Author(s):  
Partha P. Sarkar ◽  
Luca Caracoglia ◽  
Frederick L. Haan ◽  
Hiroshi Sato ◽  
Jun Murakoshi
Keyword(s):  
Experimental Data ◽  
Bridge Deck ◽  
Sensitivity Study ◽  
Derivatives Of ◽  
Flutter Derivatives

MEASUREMENTS OF FLUTTER DERIVATIVES OF A BRIDGE DECK SECTIONAL MODEL

2015 ◽  
Vol 20 (4) ◽  
pp. 107-116
Author(s):  
Leonardo Gunawan ◽  
Hadyan Hafizh ◽  
Hari Muhammad
Keyword(s):  
Bridge Deck ◽  
Sectional Model ◽  
Derivatives Of ◽  
Flutter Derivatives

DETERMINATION OF FLUTTER DERIVATIVES OF BRIDGE DECKS BY COVARIANCE-DRIVEN STOCHASTIC SUBSPACE IDENTIFICATION

2011 ◽  
Vol 11 (01) ◽  
pp. 73-99 ◽  
Author(s):  
THARACH JANESUPASAEREE ◽  
VIROTE BOONYAPINYO
Keyword(s):  
Wind Tunnel ◽  
Thin Plate ◽  
Bridge Deck ◽  
Bridge Decks ◽  
Subspace Identification ◽  
Plate Model ◽  
Wind Tunnel Tests ◽  
Stochastic Subspace Identification ◽  
Derivatives Of ◽  
Flutter Derivatives

In this paper, the covariance-driven stochastic subspace identification technique (SSI-COV) was presented to extract the flutter derivatives of bridge decks from the buffeting test results. An advantage of this method is that it considers the buffeting forces and responses as inputs rather than as noises. Numerical simulations and wind tunnel tests of a streamlined thin plate model conducted under smooth flows by the free decay and the buffeting tests were used to validate the applicability of the SSI-COV method. Then, the wind tunnel tests of a two-edge girder blunt type of industrial-ring-road (IRR) bridge deck were conducted under smooth and turbulence flows. The flutter derivatives of the thin plate model identified by the SSI-COV technique agree well with those obtained theoretically. The results obtained for the thin plate and the IRR bridge deck are used to validate the reliability and applicability of the SSI-COV technique to various wind tunnel tests and conditions of wind flows. The results also show that for the blunt-type IRR bridge deck, the turbulence wind will delay the onset of flutter, compared with the smooth wind.

The effects of fairings and of turbulence on the flutter derivatives of a notably unstable bridge deck

1988 ◽  
Vol 29 (1-3) ◽  
pp. 339-349 ◽  
Author(s):  
Dryver R. Huston ◽  
Harold R. Bosch ◽  
Robert H. Scanlan
Keyword(s):  
Bridge Deck ◽  
Derivatives Of ◽  
Flutter Derivatives

Flutter Analysis Using Quasi-Steady Time-Domain Flutter Derivatives

2019 ◽  
Author(s):  
Sébastien Maheux ◽  
Sébastien Langlois ◽  
Frédéric Légeron
Keyword(s):  
Time Domain ◽  
Forced Vibration ◽  
Bridge Deck ◽  
Domain Model ◽  
Vibration Tests ◽  
The Time Domain ◽  
Development And Validation ◽  
Derivatives Of ◽  
Great Belt ◽  
Flutter Derivatives

<p>To be able to perform nonlinear flutter analyses for bridges, time‐domain approaches should be used instead of Scanlan’s formulation of self‐excited forces. Thus, this paper addresses the development and validation of a modified quasi‐steady time‐domain model similar to Scanlan’s approach that is based on the velocity and acceleration of the bridge deck. In this formulation, quasi‐steady time‐domain flutter derivatives measured in the wind tunnel through forced‐vibration tests at absolute constant velocity and acceleration are used. For this, a unique test rig, which can be used either for free‐ or forced‐vibration tests, was utilized. By measuring the time‐domain flutter derivatives of the Great Belt Bridge, their nondimensionalization with respect to the bridge‐deck width, velocity and acceleration of the deck is validated. Then, time‐domain flutter analyses are performed using this new model. They agree with the experimental critical speed and the prediction using Scanlan’s model.</p>

Identification of eighteen flutter derivatives of an airfoil and a bridge deck

2004 ◽  
Vol 7 (3) ◽  
pp. 187-202 ◽  
Author(s):  
Arindam Gan Chowdhury ◽  
Partha P. Sarkar
Keyword(s):  
Bridge Deck ◽  
Derivatives Of ◽  
Flutter Derivatives
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