Monopile Foundation Stiffness Estimation of an Instrumented Offshore Wind Turbine through Model Updating

Table 2

Damping ratio mean and standard deviation for identified tower dominated modes across all idling datasets.

	1FA (%)	1SS (%)	2FA (%)	2SS (%)	3FA (%)	3SS (%)
Average damping ratio (%)	2.74	2.15	1.12	1.25	2.04	3.02
Damping ratio standard deviation (%)	1.96	1.05	0.53	0.55	1.21	0.76