This paper presents a comparative study of wave-induced motion responses and the added resistance of a ship. Four representative types of ships are adopted as test models: LNG carrier, tanker, containership, and bulk carrier. Two experimental techniques—captive and free-running model tests—are conducted under regular head and oblique wave conditions to create benchmark data. Several numerical computation methods (asymptotic formula, 2D strip theory, 3D panel method, and CFD) are applied to perform the seakeeping analysis. The comparison results indicate that the accuracy and reliability of each analysis technique are validated, and its characteristics and limitations are investigated with respect to the physical aspects of the added resistance caused by a wave. The analysis results are compared based on how steady flow-induced coupling effects are considered. Further, the sensitivities of seakeeping quantities with respect to wave steepness were examined based on the results of linear and fully nonlinear computations. The overall tendency of the added resistance in accordance with the incident direction of a wave is discussed.

本文对波浪引起的运动响应和船舶的附加阻力进行了比较研究。试验模型采用四种具有代表性的船舶类型：LNG运输船、油轮、集装箱船和散货船。两种实验技术——圈养和自由运行模型测试——在规则的波头和斜波条件下进行，以创建基准数据。几种数值计算方法（渐近公式、2D 条带理论、3D 面板法和 CFD）被应用于执行耐波性分析。比较结果表明，验证了每种分析技术的准确性和可靠性，并针对波浪引起的附加阻力的物理方面研究了其特性和局限性。基于如何考虑稳态流动引起的耦合效应来比较分析结果。此外，基于线性和完全非线性计算的结果检查了耐波量相对于波陡度的敏感性。讨论了根据波的入射方向增加的阻力的总体趋势。