船舶航行在不平整海床的浅水区时，常因航道限制而遭受浅水效应。同时受不平整海床的影响，水动力性能将会发生明显的变化，对船舶的安全性和操纵性产生负面影响。因此，本文基于STAR-CCM+，分析计算阶梯岸及浅水区水深对船舶水动力性能及流场的影响。结果表明：船体在经历阶梯岸后发生明[1]显的升沉和纵倾运动，船体在阶梯岸上航行时船体发生艉倾，而后由艉倾逐渐变为艏倾；船艉到达阶梯岸后船体阻力达到最大值，其中总阻力的变化主要来自剩余阻力；船体在浅水区行驶过程中，船艏兴波逐渐减小，且船艉兴波区域横波与散波有合并趋势。

Ships sailing in shallow water areas with uneven seabed often suffer from shallow water effects due to channel limitations. At the same time, due to the uneven seabed, the hydrodynamic performance will undergo more drastic changes, which will have a negative impact on the safety and maneuverability of the ship. Therefore, based on STAR-CCM+, analyze and calculate the influence of step bank and shallow water depth on the hydrodynamic performance and flow field of ships. The results indicate that the hull undergoes obvious heave and longitudinal tilting motions after experiencing step bank, and the stern roll of the hull occurs when the hull is sailing on the step bank, and then gradually changes from stern tilt to bow tilt. The hull resistance reaches its maximum when the stern reaches the step bank, in which the change in total drag is mainly due to the residual drag.  During the shallow water area, the bow wave gradually decreases, and the transverse wave and scattered wave in the stern wave area have a tendency to merge.