細長体理論による船体運動の解析(その3) : 前進速度の影響を考慮したrational strip theory

概要

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When a ship is moving through regular waves, the motion of the ship may be treated by the slender-ship theory. The consistent expansion of the slender-ship theory in the bow near field, where the distance from the bow is 0(ε^<1/2>) with e being the slenderness parameter of ship, can be performed under the high frequency motion assumtion. For such situation the forward speed effect will be included in the free surface condition for the lowest order unsteady motion potential. Thus the governing boundary value problem for the unsteady potential coincides with the time-dependent boundary value problem. Based on the time-dependent boundary value problem, Chapman tried to analize the motion of a flat plate in yaw and sway oscillation in the uniform flow. The results of his calculation gave a new light on the strip theory as advocated by Ogilvie. However the extension of Chapman's method to the usual ship-like body has not been accomplished so far. In this paper the extension of Chapman's method to the usual ship-like body will be tried and moreover the rational strip theory with forward speed effect in the free surface condition will be developed.
独立行政法人海上技術安全研究所の論文
1980-05-31