碎冰条件下冰区船冰水动力数值模拟研究

The numerical simulation research on ice and water combined force acting on ice-going ship in pack ice

本文针对典型冰区航行船建立了CFD和DEM相结合的数值模拟方法。采用CFD方法计算船体流体力,DEM方法计算船体所受碎冰力,流体和碎冰间采用浮力和拖曳力模型。基于上述方法模拟的船冰作用现象与试验现象相吻合,在此基础上,研究了航速和碎冰厚度对船体冰力的影响规律。结果表明:随着航速的增加,船体冰力呈上升趋势,流体阻力的增加速度高于碎冰阻力的增加速度;随着碎冰厚度的增加,船体冰力增大。

The CFD and DEM combined method was built to simulate the navigation of a typical ice-going ship in pack ice,in which the CFD method was used to calculate the fluid force acting on the hull while the DEM method was used to calculate the ice force acting on the hull,and the buoyant force and drag force mod?el were employed between the fluid and pack ice.Based on this combined CFD and DFM method,the phe?nomenon in the simulation agreed well with that in the test,and the influence of ship speed and pack ice thickness on the force of hull was researched,the results of which show that the ice force increases with the increase of the ship speed,and the speed of fluid resistance increase is higher than that of the ice resistance increase,and the ice force increases with the increase of pack ice thickness.