2021 Volume 77 Issue 4 Pages I_544-I_556
Overturning stability verification of an offshore wind power generator subjected to Level 2 (L2) earthquake, is conventionally evaluated through a static overturning safety factor, which does not consider the dynamic behavior of the system as well as the influence of fluid resistance of seawater. So, there is a possibility of excessive design.
The current study involves the numerical simulation of a shake table test, performed in previous studies, on an offshore wind generation foundation with gravity-type support structure using the particle method and the discrete element method. The effect of seawater and foundation mound on the wind power generation foundation is examined. From the analysis results, it was confirmed that the effect of seawater fluid resistance on the overturning stability was negligible. On the other hand, it was observed that increasing the seismic wave input level increases the effect of attenuation by the foundation mound layer.
Proceedings of the JSCE Earthquake Engineering Symposium
Environmental systems research
