Hydrodynamic Interactions between Two Lifting Bodies (西部造船会創立30周年記念号)

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Ship-to-ship interactions that the forces and moments will act on each body moving in close proximity will be of importance in ship manoeuvrability, particularly in traffic control or in ship collision in restricted waterways such as harbour or canal. In this paper, the forces and moments acting on two identical thin wing bodies in arbitrary forward direction and identical forward direction with respect to each other are computed as a two dimensional problem. This case includes a unsteady problem for determining the vorticity on the each body, but is here solved as a series of steady flow problem, i.e. as step by step in time. According to the computed results, for identical bodies moving with the same forward speed and forward direction, the both forces and moments acting on each body are greatly affected by the stagger representing the difference of longitudinal situation, and have an effect on separation distance between ships at the range of lower value than the order of ship's length. For bodies moving in arbitrary forward direction and identical forward speed, the above interactions are affected much more than that to the identical forward speed and direction because of the added effects due to the wake vorticity. In general, it seems hydrodynamic interactions between ships will be greatly affected in closer proximity range than the order of ship's length.
社団法人日本船舶海洋工学会の論文
1979-08-20