The Study On Numerical Simulation Analysis Of Wind Turbine Foundation And Structural Optimization

Wind power is one of the largest new energy and the best prospects for thedevelopment of commercialization of power generation. In recent years, China’swind power industry has made tremendous progress, many domestic wind farmprojects have been built and put into use, but there haven’t mature and unifiedtheoretical guidance for the domestic design of wind turbine foundation. Designcriterions of civil construction or power industry are often used for the design ofwind turbine foundation. In this paper, finite element simulation and analysis aboutsimplified model experiment of wind turbine foundation were conducted, furthermore, a three-dimensional model is built to study its mechanical property. The keyfindings of this paper are as follows:(1) According to the simplified experiment of wind turbine foundation, finiteelement model with steel-concrete contact nonlinear is established by using thesoftware ANSYS, the feasibility of this method to simulate bond-slip problem isanalyzed and confirmed. The results show that simulation for the contact nonlineareffect of steel-concrete structure in wind turbine foundation simplified model can bedone by selecting reasonable finite elements and constitutive of materials, especiallycontact constitutive model and parameters. This can provide a useful reference forfuture theoretical research and numerical simulation.(2) Combined with the simulation of the simplified model test, a finite elementanalysis method of wind turbine foundation exact model with contact nonlinear isproposed. The analysis of basic mechanism and stress distribution characteristics isbased on the extreme load case, which using discrete reinforcement model,considering the bonding between the steel ring and concrete, the contact effectbetween foundation and the baseground. The analysis results show that thefoundation structure is safe but there exist some local damages.(3) By optimization of the foundation steel ring structure, concrete principalstress, reinforcement tensile stress and foundation cracks with the differentfoundation steel ring parameters under extreme load conditions are obtained. Theproper parameters of the actual foundation steel ring is ascertained by a comparativeanalysis of the above results. The achievement of this paper can provide referencesfor the optimization of wind turbine foundation design and further theoreticalresearch.