Mechanical Characteristics and Optimization Design of Gravity Disk Fan Extension Foundation based on Finite Element Analysis

With the continuous increase in the capacity of wind turbines, the complex loads and long-term service stability problems faced by their foundation structures are becoming increasingly severe. The finite element method has become an important means of wind turbine foundation analysis and optimization due to its good precision control and ability to adapt to complex boundary conditions. Based on the finite element method, this study constructs a high-precision 3D numerical model of the extended foundation of a gravity disc wind turbine, and systematically analyzes its mechanical behavior under various loads. Specifically, it includes the stress distribution and deformation response of the foundation under the coupling of vertical load, horizontal load and torque, as well as key parameters such as foundation settlement, horizontal displacement, inclination rate and detachment rate under extreme load conditions. On this basis, in order to further improve the bending stiffness and anti-overturning capacity of the wind turbine foundation, a series of optimization design strategies are proposed, such as adjusting the foundation geometry, optimizing the concrete material ratio and improving the steel bar layout, etc., to provide a feasible design reference for actual projects.