2023 Volume 79 Issue 18 Article ID: 23-18172
Offshore wind power generation facilities are being developed in Japan in order to realize a decarbonized society. However, there are many uncertainties regarding the behavior of these facilities during earthquakes due to their limited construction experience and lack of experience with seismic damage.
In this study, model vibration experiments were conducted on a 5 MW monopile offshore wind turbine to understand its behavior during a large-scale earthquake. The model was modeled down to the seafloor surface and subjected to vibration using multiple seismic waves. As a result, it was confirmed that the vibration mode differs depending on the seismic wave. In order to properly evaluate the behavior similar to that of the actual structure, a model ground was created, and the model was modeled to the middle of the soil and subjected to vibration by seismic waves. As a result, it was found that the seismic behavior during and after excitation was different when the model ground was considered, due to the effect of amplification by the seismic motion in the ground.
