Among the challenging fields in structural modeling and design involving complex load scenarios stand out the applications in offshore engineering problems such as the analysis of the dynamic behavior of the support structure for open-sea wind turbines. The above task includes several basic aspects related to fluid-structure interaction (i.e. those induced by wave, current and wind forcings) which should be carefully analyzed in order to assure both optimized design and durability of the support structure. In this paper the attention is focused on an innovative computational method for simulating wave-induced loads on the support structure for offshore wind turbines: the level of development and the potentialities of the Smoothed Particle Hydrodynamics (SPH) for the above application are shown by carrying out basic tests. SPH is a lagrangian meshless approach for numerical simulation of free-surface flows characterized by sudden variations of the kinetic field and impacts with solid bodies causing high pressure gradients, large displacements and surface separation inside the continuum. Owing to the peculiarities of this computational method it can be adopted for the numerical modeling of the dynamic behavior of the support structure for offshore wind turbines forced by a wave field.
Fluid-Structure Interation in Design of Offshore Wind Turbines: SPH Modelling of BNasic Aspects
RUOL, PIERO
2008
Abstract
Among the challenging fields in structural modeling and design involving complex load scenarios stand out the applications in offshore engineering problems such as the analysis of the dynamic behavior of the support structure for open-sea wind turbines. The above task includes several basic aspects related to fluid-structure interaction (i.e. those induced by wave, current and wind forcings) which should be carefully analyzed in order to assure both optimized design and durability of the support structure. In this paper the attention is focused on an innovative computational method for simulating wave-induced loads on the support structure for offshore wind turbines: the level of development and the potentialities of the Smoothed Particle Hydrodynamics (SPH) for the above application are shown by carrying out basic tests. SPH is a lagrangian meshless approach for numerical simulation of free-surface flows characterized by sudden variations of the kinetic field and impacts with solid bodies causing high pressure gradients, large displacements and surface separation inside the continuum. Owing to the peculiarities of this computational method it can be adopted for the numerical modeling of the dynamic behavior of the support structure for offshore wind turbines forced by a wave field.
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