Hits:

Indexed by:会议论文

Date of Publication:2018-06-10

Volume:2018-June

Page Number:511-518

Abstract:The governing equation of motion of offshore wind turbine (OWT) under aerodynamic, hydrodynamic and seismic loads is derived based on blade element momentum theory (BEM), Morison equations and fundamental theories of structural dynamics. Then, a seismic analysis module is developed for the coupled analysis of a bottom fixed OWT under seismic, wind and wave loads according to the derived governing equation. An integrated bottom fixed OWT is presented referred to the NREL 5MW baseline wind turbine and a practical multi-pile offshore wind turbine in China. Dynamic characteristics and structural responses of the integrated OWT under earthquakes are analyzed by using the updated fully coupled analysis model. Then, the influence of the coupling effects of environmental load conditions on the structural responses can be found. Furthermore, the influence of seismic excitations in S-S direction for an operating OWT is investigated, it shows that the structure may confront with comparable responses in F-A and S-S direction simultaneously under such load conditions. Copyright © 2018 by the International Society of Offshore and Polar Engineers (ISOPE)