This paper presents the results of study effect of trim on resistance of US Navy Combatant DTMB 5415 model at three different drafts and two Froude numbers by using unsteady RANSE method in conjunction with towing tank tests. Firstly, the numerical results at zero trim condition were verified and validated with experimental data. Then, a series of resistance curves for different trim conditions at different drafts and speeds were performed to produce data source to evaluate the influence of trim on ship resistance. Results denote that the changing tendency of total ship resistance at different trim conditions varying with speed and draft combinations, and the variation of pressure resistance component due to trim is considerably larger than frictional resistance component. Finally, the paper provides details of flow characteristics around ship like wave patterns on free surface, pressure distribution and skin friction on the hull surface, and free water surface in order to explain the physical phenomenon of changing ship resistance at different trim condition.

本文通过非定常RANSE方法结合拖曳坦克试验，提出了在三种不同吃水深度和两个Froude数下，美国海军战斗机DTMB 5415模型的抗剪研究效果的结果。首先，对零修整条件下的数值结果进行了验证和验证。然后，针对在不同吃水深度和速度下的不同修整条件，绘制了一系列阻力曲线，以产生数据源，以评估修整对船舶阻力的影响。结果表明，在不同的纵倾条件下，总船舶阻力的变化趋势随速度和吃水组合的变化而变化，纵倾引起的耐压分量的变化远大于摩擦阻力分量。最后，