A rigid model with representation of a section of the bridge, including girders, barriers, and railings for inspection car is used in the tests, which is evaluated through the spring support system, wind force measurement system, and forced oscillator in the wind tunnel. The spring support system allows motion of the model for vibration test, and the wind forces acting on the model are measured by two three-component load cells. Our patented forced oscillator shakes the model in sinusoidal motion with heaving, sway and pitching mode, respectively, to measure flutter derivatives.
The test results show the main issues regarding wind stability of the bridge, and with further analysis of these results, our engineers are able to provide suggestions on aerodynamic or structural vibration control systems.
 
▣ Aerodynamic stability: Vortex-induced vibration, flutter, and galloping
▣ Wind force of bridge deck: Drag, lift, and moment coefficients
▣ Heaving, pitching, and sway modes
▣ Aerodynamic optimization of the girder shape to increase aerodynamic stability and to decrease static deformation due to wind