A New Approach to Damage Stability Rule (2nd Report) : Experiments to Identify the Motion Characteristics of Damaged Ships

Abstract

This paper contains the study on the static and dynamic effects of flooded water on the stability of damaged ships. Model experiments with different amounts of water in its compartments and with a damage hole are carried out to find the influence of the water inside the ship and a damage hole on the motion and damping of ships. These experiments show that the effect of flooded water on the roll motion of ships is to reduce the amplitudes at reasonance due to increase of the roll damping. The damping is found to be more for the upper-deck flooding than for the below-deck flooding. In some upper-deck flooding cases, quasi-static heel, which is time average roll angle, is observed and is different from static heel in calm water.