The seakeeping performance of a damaged ship is highly correlated to the wave incident direction. Therefore, predicting the motion responses of a damaged ship under various incoming waves is important. In this study, the seakeeping performance of a DTMB 5415 model is investigated by focusing on its roll motion under beam wave condition. The model performance under an incident wave angle (α) of 180° is widely studied experimentally and numerically. But the behaviours of a damaged ship under α = 0° remain unknown. This study aims to analyse the damaged ship motion performance under this rarely studied condition. The volume of fluid (VOF) free-surface technique is used to solve the Reynolds-averaged Navier–Stokes equations, as well as with the dynamic overset technology that handles the mesh update, the wave generation, time step and fast Fourier transform are utilised to validate the effectiveness of the adopted method. The numerical results are validated against the experimental results obtained when α = 180°. The same methodology is extended to investigate the three-degrees-of-freedom motion (roll, pitch and heave) at α = 0°. Results show that the roll motions under the two wave conditions greatly differ from each other. The discussions highlight the analysis of the possible reasons for this difference.

受损船舶的海上维护性能与波浪入射方向高度相关。因此，预测受损船舶在各种入射波下的运动响应非常重要。在这项研究中，着重于DTMB 5415模型在波束波条件下的滚动运动，研究了其航海性能。在180°入射波角（α）下的模型性能已通过实验和数值研究得到了广泛的研究。但是在α= 0°时受损船的行为仍然未知。这项研究旨在分析在这种很少研究的情况下受损的船舶运动性能。流体体积（VOF）自由表面技术用于求解雷诺平均Navier–Stokes方程，以及用于处理网格更新，波浪生成，时步和快速傅里叶变换被用来验证所采用方法的有效性。数值结果与在以下情况下获得的实验结果进行了验证：α  = 180°。扩展了相同的方法，以研究在α  = 0°时的三自由度运动（侧倾，俯仰和升沉）。结果表明，两种波浪条件下的侧倾运动存在很大差异。讨论着重分析了造成这种差异的可能原因。