Reliability of Offshore Platform With Wind Energy Production to Dynamic Forces

Kawano, Kenji (Department of Ocean Civil Engineering, Kagoshima University) | Kimura, Yukinobu (Department of Ocean Civil Engineering, Kagoshima University) | Ito, Keisuke (Department of Ocean Civil Engineering, Kagoshima University) | Tanaka, Nozomu (Department of Ocean Civil Engineering, Kagoshima University)

OnePetro 

The offshore structure is expected to have important roles on development of wind energy production system. The steady wind force, which can be provided to generate the wind energy production, would be available in the coast area with water depth about 50m. The uncertainty effects on the dynamic response evaluation of the idealized offshore platform model with offshore wind energy production are examined with wave force and seismic force in the present study. The deterioration effects of the structure on the response evaluation are also discussed with the simplified model. Furthermore, it is examined about the reduction effects on the seismic response by base isolation system installed at the deck of the structure. For the reliability evaluation of the offshore platform with the wind energy production, it is essential to carry out the available estimation to the dynamic force with uncertainty.



INTRODUCTION

The offshore structure has great possibilities of development of wind energy production system. It is so effective to the reduction of greenhouse gas emissions that it is essential to carry out development of the offshore wind energy production. The steady wind force, which can be provided to generate the wind energy production, would be available in the coast area with water depth about 50m (Hendersons (2002)). The environmental condition of the offshore structure is more severe than the land structure. If the offshore structure is located in the seismic activity area, it is essential for the reliable design of the structure to carry out the dynamic response estimation on the wave force and seismic force (kawano(2008)). The uncertainty effects on the dynamic response evaluation of the idealized offshore platform model with offshore wind energy production are discussed with wave force and seismic force in the present study. The seismic force is one of the most significant dynamic forces for the offshore structure with wind generation system, which has relatively heavy loads on the top of the tower.