Study On Force Mechanism And Stress Distribution Characteristics Of Gravity Wind Turbine Foundation

In recent years,with the vigorous development of China's wind power industry,the design system of wind turbines is constantly improving,but there is still no specific specification for the design of the main load-bearing structure wind turbine foundations in wind turbines.Considering the influence of geological conditions in different regions of China,the existing norms do not have universal applicability to different types of foundations,resulting the unreasonable structural design and the risk of local damage in wind turbine infrastructure.Therefore,the wind turbine foundation needs to be further explored.The main research contents are as follows:(1)Based on the wind turbine foundation design of a practical project,the finite element software ansys was used to establish a 1:1 model of gravity-based expansion wind turbine foundation.Based on the contact theory and the related knowledge of finite element,the stress mechanism,the displacement cloud map,and the shear cloud map are used to analyze the force mechanism and stress distribution characteristics of the gravity-based expansion wind turbine foundation,and the numerical calculation results are compared with the actual design results.It is concluded that the finite element simulation value of the maximum settlement,slope rate and foundation stress of the wind turbine foundation is much smaller than the specification limit,and the design value is relatively conservative;the gravity-based expansion wind turbine foundation has a stress concentration phenomenon on the flange.(2)According to the overall force characteristics of the wind turbine foundation structure,the influence of the size of the metal ring structure on the basic mechanical performance of the important part is studied.Parametric processing is applied to the structural dimensions of the metal ring,and a series of numerical simulation models are established.By changing the type of the metal ring,the height of the ring end,the ratio of the depth of the hole,and the thickness,the design parameters that are most favorable for structural stability are found,and the built-in fan foundation is built.Provide a basis for structural optimization of the built-in metal ring of the wind turbine foundation.(3)Using the computer Java language,combined with the optimization design opinions,the design program of "Gravity-based Expansion Wind Turbine Foundation"was compiled,and the program design of the optimized design and the visualization of the operation interface were realized.Providing a tool for the design of gravity-based extended wind turbine foundation and greatly increase design efficiency.Figure[49]table[3]references[54]...