操縦運動時の主船体流体力の推定について

概要

論文の詳細を見る
For predicting a ship manoeuvring characteristics by using mathematical model, it will be very important to estimate the hydrodynamic forces acting on ship. This hydrodynamic force depends on especially the ship's form, then it needs to estimate the hydrodynamic force acting on ship considering sufficiently with ship's form such as the frame line with high accuracy. As to these problems, Fuwa has proposed a numerical calculation method for the estimation of hydrodynamic forces acting on ship based on slender body theory. Though this method is able to estimate the hydrodynamic forces considering hull form, strength and generation point of free vortex must be determined by comparison with experimental data. In this paper, we calculated the lateral force and yaw moment acting on a ship in oblique and rotate motion by Fuwa's method. Furthermore, we examined the parameter "s" that represents the generation point of free vortex and that influences hydrodynamic forces considerably. From the results of numerical calculation, we got the conclusions as follows, (1) This method is useful for the estimation of the hydrodynamic forces acting on ship considering hull form. (2) The parameter "s" that represents the generation point of free vortex should be decided considering hull form and ship motion. (3) Further investigation on the vortex model using in this paper is necessary to estimate the hydrodynamic forces acting on ship in large motion.
1994-03-29