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© 2016 Elsevier Ltd. The complexity of the dynamic response of offshore marine structures requires advanced simulations tools for the accurate assessment of the seakeeping behaviour of these devices. The aim of this work is to present a new time-domain model for solving the dynamics of moored floating marine devices, specifically offshore wind turbines, subjected to non-linear environmental loads. The paper first introduces the formulation of the second-order wave radiation-diffraction solver, designed for calculating the wave-floater interaction. Then, the solver of the mooring dynamics, based on a non-linear Finite Element Method (FEM) approach, is presented. Next, the procedure developed for coupling the floater dynamics model with the mooring model is described. Some validation examples of the developed models, and comparisons among different mooring approaches, are presented. Finally, a study of the OC3 floating wind turbine concept is performed to analyze the influence of the mooring model in the dynamics of the platform and the tension in the mooring lines. The work comes to the conclusion that the coupling of a dynamic mooring model along with a second-order wave radiation-diffraction solver can offer realistic predictions of the floating wind turbine performance.Postprint (published version

12A finite element method for the solution of the up-to-second-order wave diffraction-radiation 13 problem in the time-domain is proposed. The solver has been verified against available analytical 14 solutions, and validated against experimental data available for the HiPRWind semisubmersible platform 15 (designed for floating wind turbines). To perform the validation, the wave diffraction-radiation solver is 16 coupled to a body dynamics and mooring solvers in the time-domain. The HiPRWind movements and 17 mooring forces have been compared for a large number of test cases, including decay tests, 18 monochromatic waves, bichromatic and irregular waves. Good agreement has been found for both, body 19 movements and mooring forces. 20

This paper presents a teaching-learning methodology focused on the acquisition of basic design principles in offshore engineering for a course entitled Projects in Offshore Maritime Structures, in a Master of Naval Architecture and Ocean Engineering. A new teaching procedure (including the Project-Based Learning approach), is proposed, for ensuring that students acquire skills related to the ability of analyzing and designing ocean structures. The roles of the Information and Communication Technologies, Computational Fluid Dynamics, potential flow methods and structural analysis are some specific features of the proposed methodology. The method increases the satisfaction of the students in a significant manner, and opens their fields in research and development on offshore engineering. ß 2016 Wiley Periodicals, Inc. Comput Appl Eng Educ 25:48-61, 2017; View this article online at wileyonlinelibrary.com/journal/cae;

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