Numerical Simulation Of Hydrodynamic Properties And Dynamic Reponse Of Tidal Power Platform

With the highlight of the global energy problem,marine energy has attracted more and more people's attention,tidal power platform is proposed as a new type of marine energy development platform.In order to ensure the safety of the tidal power platform in the working area,it is necessary to study the hydrodynamic properties and mooring system.In this paper,the hydrodynamic software AQWA which is based on three-dimensional potential theory is used to simulate the characteristics properties and dynamic response of the tidal power platform.Based on ANSYS,the hydrodynamic model of the tidal power platform is established,and the numerical simulation of tidal power platform is carried out with the help of AQWA software.The model is simplified,then the effect of water depth and center-of-gravity position on the hydrodynamic parameters such as RAOs,the F-K+Diffraction force,the steady force,added mass and radiation damping coefficient are studied.The results of dynamic response of the tidal power platform are compared with different mooring angles and different center-of-gravity position,the influence of the buoy on the motion response of the platform and the tension response of the mooring cable are analyzed.The following conclusions are obtained:1.After removing the upper member,the hydrodynamic parameters of the platform change little.In order to save the computational resources,the model can be used to analyze the hydrodynamic properties of the platform.2.The deeper the water depth,the more obvious the reflection effect of the seabed on the waves,surge RAOs and pitch RAOs of the platform will increase.The influence of water depth on other hydrodynamic parameters is at the peak and has little effect.The influence of the center-of-gravity position on the hydrodynamic parameters of the platform is in the direction of both roll and pitch,and the impact is limited.The lower the center of gravity,the more stable the platform the platform,the greater the safety factor of the mooring system,the platform is more secure.3.When ? is 45 o,the platform is the most stable and the most secure.4.The buoy has little effect on the motion response,and the proper displacement will increases the safety factor,making the mooring system more reliable.