Numerical Calculation And Experimental Study Of The Motion Response Of Multi-floating Body Offshore Wind Power Platform

Compared to fossil fuels such as coal,oil and natural gas,wind energy can be renewable and has no pollution.Therefore,it is necessary to increase the exploitation and utilization of wind energy resources.In order to achieve this goal,it is necessary to establish a safe and efficient floating wind power platform.The floating wind power platform is generally operating in the deep sea.Besides facing the complicated sea conditions,it is also important to consider the influence of the fan on the motion response of the whole floating wind turbine platform.In this paper,the relevant parameters of the floating wind power foundation are determined,and the corresponding generator equipment is selected.Combining the numerical simulation with the model test to study the motion response of floating wind power platform.Firstly,using the Patran-Pre software to establish the structural model of floating wind power platform,of which the quality of Fan and ballast was simulated by the ways of adjust local plate block density.Then exporting two model files which are used to calculate the motion response of the floating wind power platform under the action of wind and wave.Secondly,Designing calculation condition and setting the boundary conditions.In this paper,the motion response of floating wind power platform under the action of wave and the motion response of floating wind power platform under the action of wind and wave are calculated respectively.Comparing the results of them,it indicates that the motion of surge of wind power platform is the most significant,the motion of heave and sway are second,and the angular displacement motion is relatively weak.Wind load has great influence on the motion response of floating wind turbine platform.Finally,making a floating wind power platform model according to the scale of 1:50 for model test.Three cases are mainly taken into consideration:(1)to test the motion response of platform model and the pull situation of the mooring point when the fan keeps working and the model is in mooring condition;(2)to test the motion response of platform model and the pull situation of mooring points under the action of the rule wave,when the fan stops working and the model is in mooring condition;(3)to test the motion response of platform model and the pull situation of mooring points under the action of the rule wave,when the fan keeps working and the model is in mooring condition.Comparing the test results and numerical results,it shows that the numerical results agree well with the model test results.This situation indicates the experimental scheme is feasible.Analyzing the test results under different test conditions,the results show that the fan rotation has less influence on the motion characteristics of the floating wind turbine model,and the motion rules and the trend of tension response of the floating wind power platform model under different wave conditions are obtained.