Abstract Summary
Abstract: The floating offshore wind turbines (FOWTs) have been extensively studied and are being and will be installed more in the world to generate more clean energy to reduce the trend of global warming. The construction and maintenance of wind farms require a large number of ships, and some wind farms are built near waterways. Hence, the FOWTs are often exposed to the threats from collisions by visiting and passing ships. Although the previous literatures have investigated dynamic response and damage of FOWT under the ship collision, they focused on global motions and local deformations with the simplified models or loads. In the present work, a new co-simulation technology using MATLAB and LS-DYNA was developed to consider the aero-hydro-servo-elastic-ship collision coupling analysis of FOWTs. The wind load, wave load and controller are established in MATLAB and then transferred to LS-DYNA by the functional mock-up interface (FMI), and the displacement, velocity and acceleration of high-fidelity finite element Model in LS-DYNA are transferred to MATLAB through the same interface. The proposed model in the present work can capture the responses of FOWTs well comparing with FAST’s results in terms of different cases. Finally, the dynamic responses and damages of a NREL 5 MW spar-type floating offshore wind turbine impacted by a 3500-ton vessel were investigated, considering different impact velocities, wind and wave loads.
