Numerical Simulation And Experimental Verification Of Wind Power Response Of Trawlers

With the implementation of China ’s " double carbon " plan,people turn their attention to the development and utilization of renewable energy.The development and utilization of wind energy has attracted people ’s attention,and the wind power industry has also shown a trend of development from offshore to offshore.At present,people have initially applied wind power generation technology to fishing boats,but it has just started and is still in the stage of exploration and research.As a key component of energy conversion,the dynamic characteristics of wind turbine blades are related to the safety of marine wind turbines.Therefore,this thesis mainly studies the dynamic characteristics of wind turbine blades.In this thesis,a double-deck trawler and a NREL 5MW wind turbine with a scale ratio of 1 : 10 are used as prototypes.The coupling framework(F2A)of FAST and AQWA is used to realize the aerodynamic-hydrodynamic-servo-elastic coupling load calculation of horizontal axis wind turbine and the dynamic response of wind turbine blades under regular wave conditions under different constant wind speeds and different speeds.Based on this,a test model was developed,and a specific scale ratio was used.The towing tank test was carried out to evaluate the mechanical properties of the wind turbine model.By comparing the results of numerical simulation and towing tank test,it is found that external factors have a certain influence on the dynamic response of wind turbine,which verifies the rationality of numerical calculation.The specific research contents of this thesis are as follows :(1)The development status of offshore wind power and the development prospect of mobile offshore wind power are analyzed.Understand the marine environment and determine the marine environmental load,and systematically discuss the related theories of environmental load and blade structure dynamics.(2)The application of wind turbine numerical simulation method in double deck trawler is realized.A new aerodynamic-hydro-servo-elastic coupling framework(F2A)based on FAST and AQWA is used to simulate the motion trend of the wind turbine on the upper deck of the double deck trawler under different sailing speeds and various working conditions.The time history curves of blade tip displacement,root shear force and six degrees of freedom of the platform are obtained.According to the motion time history curve,the dynamic response of the wind turbine with the change of speed and wind speed is studied from the perspective of motion vibration amplitude and equilibrium position.(3)Based on the towing tank model,the dynamic response test of the wind turbine of the double deck trawler is carried out.According to the similarity criterion,the towing tank test model was made according to the ratio of 1 : 10 of the numerical model,including 3D blade model,double deck trawler model and so on.Subsequently,the towing tank test was carried out and the test data were post-processed.By comparing the test results with the numerical calculation results,it is found that the test results and the numerical calculation results are basically consistent with the trend of the change law with the speed,which verifies the rationality of the numerical calculation and provides a scientific reference for the design and construction of marine wind turbines under ship navigation.