Towline Tension and Unstable Motion of Damaged and Capsized Geometric Ship During Towing

摘要

The towline tension and unstable motion of the disabled and damaged ships have been investigated in this paper using the geometrical model ship in the towing experiment in order to establish the estimation method of the towing force and towing method. The towing experiment was carried out both in stilt water and in waves. The towing resistance coefficients on various kinds of conditions such as towing direction, towing speed, ship status and towing points were compared in still water. The unstable motion both in regular and irregular waves were also compared with that in still water concerning sway amplitude, yaw amplitude and yaw period. The towing experiment on the condition of following waves was also made as well as the head waves condition. The unstable motion and the towline tension increase in waves have been investigated experimentally.