舵角試験時の船体・プロペラ・舵の相互干渉について

概要

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The maneuvering motion of ship is usually predicted by the MMG model, which includes three interaction forces induced by rudder action. Those are forward and lateral forces and yawing moment induced by a steered rudder and they are expressed by the interaction factors t_R, a_H and x_H, which are determined experimentally by the so-called rudder angle test. In this paper, we try to explain the mechanism by a theoretical calculation. The hull and rudder are represented by a panel method called SQCM (Source and QCM) that was developed for thick wing at Kyushu University, and the propeller is expressed by the infinitely bladed propeller. Calculating the flow field corresponding to the rudder angle test of three full ships (SR221 A, B, C) with different afterbody shape, we can obtain the interaction forces acting on the hull, the propeller and the rudder. Then experimental interaction forces are compared with calculated ones. From these results, we almost clarify the interaction mechanism during the rudder angle test.
社団法人日本船舶海洋工学会の論文
2001-08-31