自由面和岸壁对限制航道中船舶操纵性水动力的影响

A STUDY ON THE EFFECT OF FREE SURFACE AND BANK ON HYDRODYNAMIC MANOEUVERING FORCES ACTING ON SHIPHULLS IN RESTRICTED WATER

本文在二阶抛物面离散后的船体表面单元上布置强度呈线性分布的Rankine源，在离散后的岸壁单元上和用贴体网格法离散船体附近自由面的单元上布置均匀Rankine源，在船体中纵面上布置强度在水深方向呈阶梯变化的附着涡线．计算了考虑自由而影响下船舶平行于岸壁航行时的水动力，还着重讨论了自由面和岸壁对限制航道中船舶水动力的影响．

In this paper, linearly variable Rankine sources are distributed on the panels of ship body surface which is discrete by means of parabolic curve plane, the uniform rankine sources are arranged on the bank and the local free surface around the ship hull, the local free surface is divided by using body-fitted grid, the vortex filaments whose strength is the step function in depth direction are arranged in the longitudinal centre plan of the hull. The hydrodynamic forces acting on the ship hulls moving in parallel to the banks are calculated.The emphasis is put on the study of the effect of free surface and bank on the ship hydrodynamic forces in restricted water.