Dynamic analysis of offshore wind turbines subjected to the combined wind and ice loads based on the cohesive element method

Ice loads are an important and decisive factor for the safe operation of offshore wind turbines (OWTs). In severe environment load cases, it shall lead to prominent ice-induced vibration fatigue failure OWT structures. Based on cohesive element method (CEM) considering pile–soil interaction used by nonlinear distributed springs, full model ice monopile structure with ice-breaking cone in a cold sea region is established this study. Furthermore, Tsai-Wu criterion empirical formula maximum plastic strain describe mechanical behavior bending collision simulation tool LS-DYNA, dynamic under different velocities angles statistically analyzed. Finally, according process between containing cone, response combined studied, most reasonable angle determined. The results show that adopted paper can well simulate ice. Concurrently, has significant impact damage OWT, recommended optimal 60.