The aim of this paper is to investigate the inline force and bow wave height on a vertical cylinder moving at a constant forward speed in calm water and in regular waves. A series of physical model tests has been performed to investigate the effect the waves have on both the inline force and the bow wave height as well as to validate a Computational Fluid Dynamics (CFD) model that was developed using Caelus open source code. A stationary mesh was used in the CFD model and a new wave library was created based on the relaxation zone technique to incorporate the effect of adding a current with velocity equal to the speed of the moving cylinder while still generating the targeted wave field. The CFD results were compared to the physical measurements for the following cases: (1) generation of regular waves and current, (2) inline force and bow wave height on the cylinder moving in calm water and (3) inline force and bow wave height on the cylinder moving in regular waves. It was found from the model tests that both the inline force and bow wave height increased as cylinder speed increased. The maximum inline force and bow wave height measured on a stationary cylinder subjected to waves was amplified up to 9.6 and 2.7 times, respectively depending on the cylinder speed in case 3, which indicated a nonlinear relationship between the variation in maximum inline force and bow wave height due to wave–current interaction. The capability of the CFD model has been illustrated by the very good agreement (errors of about 3.0%) achieved with respect to the experiments for the different conditions of increasing complexity tested in this study.

本文的目的是研究在静水和规则波浪中以恒定前进速度移动的垂直圆柱体上的直线力和船首波高。已经进行了一系列物理模型测试，以研究波浪对轴向力和弓波高度的影响，并验证使用 Caelus 开源代码开发的计算流体动力学 (CFD) 模型。在 CFD 模型中使用了静止网格，并基于松弛区技术创建了一个新的波库，以结合添加速度等于移动圆柱体速度的电流的效果，同时仍生成目标波场。将 CFD 结果与以下情况的物理测量结果进行比较：(1) 产生规则波和电流，(2) 在静水中移动的圆柱体上的轴向力和首波高度； (3) 在规则波浪中移动的圆柱体上的轴向力和首波高度。从模型试验中发现，随着油缸速度的增加，直线力和船首波高都增加。在受波浪作用的静止圆柱体上测得的最大直列力和首波高度分别放大了 9.6 倍和 2.7 倍，这取决于案例 3 中的圆柱体速度，这表明最大直列力的变化与首波之间存在非线性关系波-流相互作用引起的高度。CFD 模型的能力通过在本研究中测试的复杂性不断增加的不同条件下的实验获得的非常好的一致性（约 3.0% 的误差）得到了说明。