Experimental study of characteristics of sidewall green water event for a ship-type FPSO under irregular wave conditions

This study conducted an experimental investigation into the characteristics of the sidewall green water problem of a ship-type floating production storage and offloading (FPSO) under irregular waves. The study applied three different irregular waves and two different heading angles. Relative wave elevations were measured using 12 wave probes on the deck and side of the FPSO model, along with the forces acting on pillars during the green water event. The process of the sidewall green water event was studied, investigating variations in relative wave elevations and forces acting on the pillars based on the heading angle. The experimental results examined correlations between the vertical motions of the FPSO model and relative wave elevations. Bow green water events at heading angles of 165° and 150° were mainly affected by the pitch and roll motions of the FPSO model, respectively. Additionally, it was found that the side green water event is affected by the heave motion of the FPSO model.