Abstract Summary
This paper proposes a multi-level system modeling for studying the structural behavior of an Offshore Wind Turbine (OWT) with a flexible monopile foundation considering the Pile-Soil Interaction (PSI). This analysis shows that the structural response is affected by a signifi-cant uncertainty due to the randomness of the geometric and mechanical properties of the tower and foundation and by the environmental loads and rotating blades. With a Monte Carlo simulation, the sources of uncertainty of the environmental and exchange zones are generated for a Performance-Based Wind Engineering (PBWE) design of the OWT. This way the structural response, the stresses along the flexible foundation, and the power production can be evaluated in probabilistic terms estimating the best design configuration. These re-sults are compared to the PBWE design of the OWT controlled by a Pendulum Tuned Mass Damper (PTMD) used to mitigate structural vibrations.
