The effect of uniform flow appears as additional stiffness and damping, which are often called aerodynamic stiffness and aerodynamic damping. These effects are functions of flow (wind) speed.
The objective of this ambient monitoring was to extract aerodynamic stiffness and aerodynamic damping from the girder response data under various levels of wind speeds.
If the measurement is performed in windy condition, wind speed and direction is also measured for calculating the
aerodynamic damping that is used in calculation of effective damping for cables [5].
Though the shift from stall regulation to pitch control will significantly avoid stall related instability during operation, due to the inherent low
aerodynamic damping for edgewise model, the edgewise instability is still a critical problem.
Inter-blade coupling (due to the shrouds,
aerodynamic damping and etc.) is considered.
In effect, if the aerodynamic force (proportional in this case to dz/df) is considered as a contribution to the total damping of the system (
aerodynamic damping), the total damping coefficient is
Some of the explanations are rather in-depth--spider webs not throwing insects back off after they hit the web because of hysteresis and
aerodynamic damping, for instance.
"With the model, we found, unexpectedly, that
aerodynamic damping has a tremendous effect on capturing prey On the scale of insects, air resistance plays a large role.
Based on the
aerodynamic damping estimated from the wind tunnel tests [1] at Tongji University, the modal damping ratio of SCB is finally obtained by deducting the corresponding
aerodynamic damping ratio from the identified total damping ratio.
