2022 Volume 78 Issue 2 Pages I_895-I_900
In the seismic design of offshore wind turbines, aeroelastic analysis codes are used for wind and waves, and general-purpose analysis codes are used for earthquakes, and the cross-sectional forces obtained from each analysis are sometimes superimposed to evaluate performance. However, this method does not allow for a precise evaluation of the behavior of offshore wind turbines that are subject to wind even during earthquakes, and may lead to economically disadvantageous designs.
Therefore, in this study, the effect of wind during an earthquake was evaluated for a monopile supported offshore wind turbine using a coupled analysis in which wind and earthquake act on the wind turbine simultaneously. In order to consider liquefied ground, which is a concern in coastal areas, a modeling method for soil-structure interaction springs in multiple support excitation analysis was investigated.
