迎浪条件下的参数横摇现象，作为一种重要的稳性失效模式受到了国际海事组织（IMO）的高度关注。由于横摇惯性矩对横摇固有周期的作用，使之成为参数横摇的决定性影响因素之一。本文比较了4种实船横摇惯性矩的计算方法，并采用一种三自由度弱非线性模型研究了其对参数横摇预报的影响。辐射力和绕射力的计算基于三维频域理论，时延效应采用脉冲响应函数法考虑。通过对3艘集装箱船的参数横摇敏感性分析，讨论了横摇惯性矩的不同计算方法对运动响应预报的影响，并给出了可用于第二代完整稳性参数横摇衡准的横摇惯性矩简化估算方法。%Parametric rolling in head seas as one of the main stability failure models has attracted significant attentions of the International Maritime Organization (IMO). Roll moment of inertia is one of the key factors for predicting parametric rolling, since it has strong effect on natural roll period. In this paper, total of four calculation methods of roll moment of inertia are compared with each other and a 3 DOF weakly non-linear model is presented to study their effects on the prediction of parametric rolling. Radiation force and diffraction force are calculated based on 3D frequency-domain method, and time-delay effect is taken into account with the help of impulse response theory. The effect of different calculation methods of roll moment of inertia on the response of motion is discussed based on the vulnerability analysis of 3 actual container ships, and a simplified empirical approach of roll moment of inertia is given, which could be applied to the second generation intact stability criteria for parametric rolling prediction.
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