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

Figure 14

Complex normalised mode shapes from 09:00-09:10 29/08/2017, presented in their dominant axis, identified from modal analysis (N4SID) and predicted using the rigid-rotor finite element model with the ensemble optimised macrofoundation compliance . Identified mode shapes normalised at their maximum against the corresponding model predicted mode shape. (a) 1^st FA. (b) 2^nd FA. (c) 3^rd FA. (d) 1^st SS. (e) 2^nd SS. (f) 3^rd SS.