Wind energy has the potential to be one of the main drivers in the renewable energy era, however, it still needs to overcome certain challenges for an efficient implementation. Deep water (> 60 m) offshore wind concentrates the major share of wind resource, which is why it is imperative to develop improved technologies for its optimal exploitation. One of the main challenges regarding the implementation of floating offshore wind turbines is the Capex required, where one of the most significant costs is the floating structure that gives buoyancy and stability to the wind turbine. This thesis presents an early stage optimization method for the design of floating structures, however, it is important to conduct additional reliable simulations to validate these results and ensure their effectiveness.