Integration of a 6DOF floating platform model in QBlade

This work's main focus is the analysis of the dynamics of floating offshore wind turbines. Starting from a model of floating platform realized on Simulink, is operated an extension from three to six degrees of freedom, allowing a variable wave direction also. After realizing CAD models of the floater to obtain all the inertia properties, an hydrodynamic simulation of the floating platform is performed, to obtain the characteristic parameters. A stability analysis of the model is performed, before converting it into C++ programming language to allow the interaction with external softwares. The source code is edited to make the user able to change the simulation parameters, and after compiled in form of a C++ library with the creation of a communication interface between the model and QBlade provided by the TU Berlin, used for the simulation of wind turbines, using a C++ class. Within the source code of QBlade, modifications have been made, to couple the wind turbine simulation to the floating platform, and to create a graphical, user-friendly interface for the modification of the simulation parameters. Also a stand alone console application for the simulation of the floating platform only is developed. A detailed description of the system and of all mathematical models involved and their practical implementation is provided, together with the source code of the library an explanation of the procedure followed for the creation of it. Simulation of the behavior of the system under different environmnental conditions, considering turbulent and laminar wind fields with variable average speed, and different sea waves with varying period and significant wave height. Fluid dynamic analysis of the flow field around the rotor and in the wake, allowing a 3d visualization of the flow field. Effects of tower shadow and 3D Himmelskamp effect.