Research on Lateral Displacement Estimation of Monopile Foundation for Offshore Wind Turbines
The construction of the lateral displacement estimation model of monopile foundation for conventional offshore wind turbines mostly adopt particle swarm optimization algorithm.However,this algorithm cannot accurately calculate the coupling force between seawater and monopile foundation,and the estimation accuracy is low.In this regard,the lateral displacement estimation research of monopile foundation for offshore wind turbines is proposed.Firstly,according to the basic structure of offshore wind turbines and connecting monopile foundation,the monopile foundation structure is divided into sections,and the monopile foundation structure dynamics equation is established.Then,the coupling force between seawater and monopile foundation is obtained by combining the three fields of seawater area,monopile foundation area and the junction of the two,and the force value of monopile foundation is calculated.Based on this,the cumulative strain exponential type empirical formula of monopile foundation under wind and wave cyclic loading is used to construct the lateral displacement estimation model of monopile foundation.The NREL 5 MW monopile foundation offshore wind turbines in a sea area is used as an example for simulation and comparison tests of the proposed model.The test results show that the constructed model has a higher estimation accuracy,i.e.,the accuracy is above 98％.The model can better monitor and evaluate the structural safety of offshore wind turbines,and to detect potential problems and repair or maintain in time.
Offshore wind turbinesMonopile foundationLateral displacementDynamic equationsModel construction
万方数据
维普
