Effect of Heave Plate On Semisubmersible Response

Abstract

This paper presents the findings from a study of heave plates on a deep draft semisubmersible. It reveals that the location or draft of heave plates has a significant impact on their effectiveness. When not located properly, heave plates could increase the heave response of a semisubmersible and would not be beneficial. Parametric study results on the heave responses of the semisubmersible with heave plates at different elevations are first presented. Recommendations are then made on how to effectively locate the heave plates based on these results. The motion responses of the deep draft semisubmersible presented in this paper are also compared with those of a conventional semisubmersible. The comparison results indicate that even without the heave plates on, the deep draft semisubmersible possesses superior heave motions and could be a viable dry-tree floating solution in harsh environments.