Ships in ocean waves are suffered from cyclic wave loads which can cause fatigue damage to ship structures. Classification societies require owners to carry out fatigue assessment for ship structure for its potential great loss caused by fatigue failure. Currently there are many fatigue assessment methods including simplified method, deterministic method, spectral-based method and time domain method. But none of them predict fatigue life precisely and effectively. Based on linear superposition theory and the assumption that a linear relationship occurred between waves and ship structural response, some scholars proposed the hybrid frequency-time domain method. This method avoids the imprecise narrow band approximation in spectral-based method and adopts rainflow counting instead. However, the hybrid method is not applied extensively on ship fatigue assessment because relevant research is insufficient. In this paper, aiming to validate the hybrid method, a segmented ship model test is carried out, and the short-term fatigue damages of a 4600TEU container forecasted by hybrid method and traditional methods are compared. Results shows that the hybrid method forecasts the closest fatigue damage prediction to time domain analysis and owns enough efficiency. But in some area located at midship, hybrid method may predict lower fatigue damage than time domain method.

海浪中的船舶会遭受周期性波浪载荷的影响，这可能会损坏船舶结构。船级社要求船东对船舶结构进行疲劳评估，以评估其因疲劳失效而可能造成的巨大损失。当前有许多疲劳评估方法，包括简化方法，确定性方法，基于频谱的方法和时域方法。但是他们都没有准确，有效地预测疲劳寿命。基于线性叠加理论，并假设波浪与船舶结构响应之间存在线性关系，一些学者提出了时频混合方法。该方法避免了基于频谱的方法中不精确的窄带近似，而是采用了雨流计数。然而，由于相关研究不足，混合法没有广泛应用于船舶疲劳评估。为了验证混合方法的有效性，进行了分段船舶模型试验，比较了混合方法和传统方法预测的4600TEU集装箱的短期疲劳损伤。结果表明，该混合方法预测的疲劳损伤预测最接近时域分析，并具有足够的效率。但是在中船某些区域，混合方法比时域方法预测的疲劳损伤更低。结果表明，该混合方法预测的疲劳损伤预测最接近时域分析，并具有足够的效率。但是在中船某些区域，混合方法比时域方法预测的疲劳损伤更低。结果表明，该混合方法预测的疲劳损伤预测最接近时域分析，并具有足够的效率。但是在中船某些区域，混合方法比时域方法预测的疲劳损伤更低。