Seabed instability simplified model and application in offshore wind turbine

The offshore wind power is increasingly developed, it is essential to study the design technology of the offshore wind turbine foundation, which is crucial to reduce the construction cost of the offshore wind farm. In the design of marine pile foundations, the evaluation of wave-induced seabed stability is quite significant. Based on the mechanical properties of seabed, this article firstly puts forward one simplified mechanical model, and then derives the soil displacement distribution of the two-dimensional seabed under wave action. Combining this simplified model of seabed instability with the dynamic p-y curve method, the offshore wind turbine monopole is modeled in ANSYS, and the effect of seabed instability on the bearing capability of the marine pile foundation is evaluated, some conclusions are obtained, which could be referenced in the design and analysis of the offshore wind turbine foundations.