深吃水圆筒型核能平台的设计吃水与主体直径相近，主尺度特征有别于现有圆筒型海工平台。为探究其性能特点，针对深吃水圆筒型核能平台的水动力特性和时域运动响应展开计算研究。采用计算流体力学（Computational Fluid Dynamics，CFD）方法模拟平台横摇和垂荡自由衰减，并基于二次阻尼模型计算相应阻尼因数；基于势流理论计算平台响应幅值算子（Response Amplitude Operator，RAO）和固有周期，并结合南海典型海况对平台的运动响应性能和适用性进行分析评估。结果表明：深吃水圆筒型核能平台垂荡、横摇和纵摇固有周期均长于常见波浪周期；平台纵荡运动主要受二阶波浪载荷影响，低频特性明显；垂荡和纵摇运动受自身固有频率影响较大，垂荡同时表现出波频特性。深吃水圆筒型核能平台总体运动性能良好，适应南海海况，所得结果可为工程应用提供相关参考。
The design draft of the deep-draft cylindrical offshore nuclear power platform is similar to the diameter of its main hull, which makes its principal dimension characteristics different from the existing cylindrical platforms. In order to explore its hydrodynamic performance, a computational analysis is carried out on the hydrodynamic characteristics and time domain dynamic response of the deep-draft cylindrical offshore nuclear power platform. The roll and heave free decay motions of the platform are simulated based on the Computational Fluid Dynamics (CFD) method, and the damping factors are obtained based on second order damping model. The Response Amplitude Operator (RAO) and natural periods of the platform are calculated based on the potential flow theory. Combined with the typical marine environment conditions in the South China Sea, the motion response performance and applicability of the platform are analyzed and evaluated. The results show that: the natural periods of heave, roll and pitch of the deep-draft cylindrical nuclear power platform are higher than those of the common waves; the surge motion of the platform is mainly affected by the second-order wave load, and the low-frequency characteristics are obvious; the heave and pitch motions of the platform are mainly affected by its natural frequency, and the heave motion also exhibits wave-frequency characteristics. The overall hydrodynamic performance of the platform is good, and it is suitable for operations in the South China Sea. The results of the study can provide relevant reference for the engineering applications.