An offshore wind turbine can be considered as a relatively complex structural system ...

An offshore wind turbine can be considered as a relatively complex structural system

since several environmental factors (e.g. wind and waves) affect its dynamic

behavior by generating both an active load and a resistant force to the structure’s

deformation induced by simultaneous actions. Besides the stochastic nature, also

their mutual interaction should be considered as nonlinear phenomena could be

crucial for optimal and cost-effective design. Another element of complexity lies in

the presence of different parts, each one with its peculiar features, whose mutual

interaction determines the overall dynamic response to non-stationary environmental

and service loads. These are the reasons why a proper and safe approach to the

analysis and design of offshore wind turbines requires a suitable technique for

carrying out a structural and performances decomposition along with the adoption of

advanced computation tools. In this work a finite element model for coupled windwaves

analysis is presented and the results of the dynamic behavior of a monopiletype

support structure for offshore wind turbine are shown.

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