ANALYTICAL SOLUTION OF MONOPILE-BASED OFFSHORE WIND TURBINES UNDER DYNAMIC LOADS

Abstract

Nowadays, renewable and sustainable energy resources such as offshore wind turbine energy are set to become mainstays of future energy supplies in all the world. Because of safety requirements in offshore wind turbine design, any proposed analytical solution is necessary. This paper proposes a novel solution to analyze the dynamic behaviors of offshore wind turbine monopile. In this case,  the model is a rigid bar with 2 degrees of freedom, the general equations for plane motion are applied, displacements and rotation are got by simulation workflows in Simulink of Matlab. The numerical results which are obtained from the novel solution in cyclic foundation analysis agreed with other methods, the errors are as much as 3.0% and 5.0% lower for the cases with ADINA and FP-MultiPier programs, respectively. Further research should focus on complex loads such as seismic, wind, wave forces.