Research On The Roll Damping Prediction And Motion Response Of The Wind Turbine Transport And Installation Ship

Countries attach great importance to the development of new energy.Offshore wind power has become an important direction of renewable energy development because of its unique advantages.In the construction of offshore wind farms,ensuring the safety of transportation is the primary premise.The increasing capacity of single wind turbine makes the wind turbine transportation and installation ship develop towards large-scale trend.When the ship is sailing at sea,it is affected by the marine environment,which leads to the occurrence of six-degree-of-Fneedom motions such as roll,pitch,yaw,sway,surge and heave.These six degrees of Fneedom motions are closely related to the ship’s maneuvering and the crew’s work and life.Among them,rolling motion is the most common and dangerous.Rolling motion is the key to determine whether the ship capsizes under certain sea conditions.Therefore,accurate prediction of rolling amplitude is very important for the safe navigation of ships.The roll amplitude changes with the change of roll damping.The key to the prediction of roll amplitude is the accurate calculation of roll damping.However,the traditional method based on potential flow theory cannot consider the influence of viscous damping.Therefore,this thesis takes the wind turbine transport and installation ship as the research object,and uses STAR-CCM+and ANSYS software to carry out numerical simulation and motion amplitude prediction of ship roll Fnee decay motion.Firstly,the numerical model of DTMB5512 ship model is established based on STAR-CCM+,and the roll Fnee decay curve obtained by computational fluid dynamics(CFD)method is compared with its model tank test to verify the accuracy of the CFD model of ship roll Fnee decay motion established in this thesis.Secondly,in order to compare the accuracy of different rolling damping methods,the critical damping correction method,Nikolayev formula method and equivalent damping method are used to calculate the linear rolling damping coefficient of the wind turbine transport and installation ship.Thirdly,based on ANSYS Workbench,the model of the wind turbine transport and installation ship is established.The linear rolling damping coefficients obtained by the three methods are substituted into the hydrodynamic calculation model to predict the rolling motion amplitude of the wind turbine transport and installation ship in regular wave and random wave respectively.Finally,the results obtained by the three methods are compared and analyzed.The research on the prediction method and damping...