3D simulation of monopile under wave and wind loads in liquefiable soil

After years of using fossil fuels, the use of renewable energy is now growing. Offshore wind turbines are one of the ways to benefit from clean energy. This article studies the dynamic reactions of offshore wind turbine (OWT) supported on monopile foundation in saturated soil under wave and wind loads separately and combined. The wind load was calculated using the power spectral density function with different velocities and applied to the turbine blade and the turbine tower. To modeling the random waves the Pierson-Moskowitz spectrum is used and the force of sea waves on the body of monopile calculation is based on the diffraction theory. The models are simulated in three-dimensional and written with the help of TCL programming language and analyzed with open-source software OpenSees. The effects of several factors on the dynamic responses of the models are investigated. The results are shown that it is essential to examine the combination of wave and wind loads in the analysis and design of OWT.