ABSTRACT
Various hybrid systems combined with several foundation elements have been proposed to improve the lateral performance of offshore wind turbine (OWT) monopile. Among them helical monopile foundation has received more attention and has been used in offshore wind pilot project for supporting OWTs. The idea of helical monopile provides optimized foundation solution for the new generation of OWTs. The numerical study investigates the stability of traditional OWT monopile and helical monopile under combined lateral loading across different soil profile with slenderness ratio of 7.6 for 5MW OWT slenderness ratio lies in between 6-8. Offshore monopile subjected to combined lateral load from wind, current and wave, are compared to helical monopile which feature a more complex multi-material structure. The Finite Element Method is used to simulate the response of these foundation in soft clay. Key parameter examined include displacement due to axial and lateral loading. The result reveal that hybrid monopile exhibit improved performance in terms of axial and lateral stability which providing critical insights into foundation design optimization for OWTs in varying marine environments.
