浅水域における曳船・被曳船系の針路安定性

概要

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The directional stability of tow and towed vessels is very important factor in the scope of marine safety, especially in bay and canal. It is well-known that the directional stability of those vessels will be also affected by the water depth. In general, much longer towing rope is used for improvement of the directional stability on vessel that has poor stability. However, it is difficult to apply such the way in bay and canal overcrowded by many vessels because the total length of tow and towed vessels system is limited in such area. In course changing motion, a deviation is taken between trajectories of tow and towed vessels, and the trajectory of the vessels in shallow water differs from that in deep water. In this paper, we discuss the effect of water depth, length of towing rope and current on the directional stability of the system by numerical simulations. From the simulations, we got the concluding remarks as follows. (1) The directional stability of tow and towed vessels will be affected so much by the water depth comparing with the effect of the towing rope length. Therefore, it will be needed to consider the influence of water depth for tow and towed vessels system. (2) The course of the system is changed by the influence of current, and vessels take much deviation between trajectories of tow and towed vessels especially in against current.
社団法人日本船舶海洋工学会の論文
1992-09-04