Use of ship fin stabilizers in passive mode

Abstract: The article presents the results of an analysis of the possibilities of using ship fin stabilizers operating in passive mode. The issue is applicable in severe hydrometeorological conditions at sea, when the stabilizer fin control automation is no longer able to ensure the correct operation of the system. In the course of the research, the roll equation in one degree of freedom and CFD modeling were used.
1. SHIP FIN STABILIZERS
Stabilization of ship rolling is one of the important issues addressed in naval architecture. The use of stabilization systems has become quite common in shipbuilding, particularly on passenger ships, ro-ro vessels, and container ships
[8]. The resulting reduction in roll amplitude and acceleration values increases the operational efficiency of a seagoing vessel.
Among the many roll stabilization systems, fin stabilizers, which are classified as active systems, play an important role. Invented at the end of the 19th century, they were put into practice in the first half of the 20th century and popularized in its second half.
The basic design concept of fin stabilizers is not very complicated.
In the area of the ship’s bilge, amidships, fins (hydrofoils) are mounted, which are rotated by a certain angle by a mechanism built into the hull. The angle at which each fin is set is changed during navigation and is continuously adjusted by the control system based on the current roll angle of the ship and the rate of change of that angle [6]. (…)

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