Abstract:
The probability density theory of an extreme event based on the generalized probability density evolution equation is employed to investigate the dynamic reliability of an offshore wind turbine tower subjected to wave loads. The wave field is simulated by using the linear water wave theory and stochastic Fourier spectrum of ocean waves which originates from quasi-laminar wind-wave generation mechanism. Deterministic structural responses are analyzed by the finite element method. The results indicate that the dynamic reliability of the top drift for the offshore wind turbine tower under different thresholds can be evaluated reasonably by the probability density theory of equivalent extreme events. The result of dynamic reliability according to a Poisson model exhibits a worse accuracy as the threshold decreases.