Journal
RENEWABLE ENERGY
Volume 168, Issue -, Pages 991-1014Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2020.12.093
Keywords
Floating offshore wind turbine; Dynamics modeling; Reliability analysis; Wind-wave joint distribution; Probability density evolution method
Funding
- National Natural Science Foundation of China [11672209, 51725804, 11761131014]
- International Joint Research Program of Shanghai Municipal Government [18160712800]
- International Exchange Program for Graduate Students, Tongji University [2018020025]
Ask authors/readers for more resources
The study evaluated the short-term dynamic reliability of a spar-type FOWT using the probability density evolution method (PDEM). A coupled dynamics model for the FOWT was established and the conditional joint probability distribution of significant wave height and peak spectral wave period at the cut-out wind speed was constructed. The stochastic dynamic response and reliability of the FOWT were analyzed using PDEM, showing that the reliability for normal operation is less than 0.2 when the acceleration at the tower top is used as the failure criterion.
Floating offshore wind turbine (FOWT) towers are dynamically sensitive to wind and wave excitations. Since the wave tends to be harsher with the increase of wind speed, FOWT towers are likely to experience the most severe vibration operating at the cut-out wind speed. In the present study, the shortterm dynamic reliability of a spar-type FOWT is evaluated based on the probability density evolution method (PDEM). For this purpose, an integrated coupled dynamics model for the FOWT is firstly established by incorporating the multibody dynamics with the finite element (FE) method. Next, the conditional joint probability distribution of the significant wave height and peak spectral wave period at the cut-out wind speed is constructed based on the copula model. Then, the stochastic dynamic response and reliability of the FOWT can be analyzed via PDEM. The numerical example of reliability analysis of a 5-MW spar-type FOWT operating at the cut-out wind speed is carried out, in which the long-term met ocean data at a South China Sea site is utilized. Simulation results show that the reliability of the FOWT for normal operation is less than 0.2 when the acceleration at the tower top is adopted as the failure criterion. (c) 2020 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available