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为研究转塔式系泊储油轮的动力响应,应用二阶频域摄动理论计算了其在压载状态下的一阶运动响应、二阶运动的响应谱及锚泊线张力谱,并与相应的模型试验结果进行了比较.试验中浪向角为180°,波谱采用PM谱和白噪声谱.理论计算涉及二阶慢荡阻尼,为此进行了模型在规则波上的衰减试验,系泊形式由弹簧系统代替锚泊系统.频域计算中的二阶慢荡阻尼参考弹簧系统在不规则波下试验所得的阻尼值.计算分析以及与实验结果的比较表明,理论结果和相应的试验结果符合较好.弹簧系统在不规则波下的阻尼值可作为频域计算中二阶慢荡阻尼的参考.二阶频域摄动理论可用于分析转塔式系泊储油轮的动力响应
In order to study the dynamic response of turret mooring oil tanker, the first-order kinematic response, the second-order kinetic response spectrum and the mooring line tension spectrum under the ballast condition are calculated by the second-order frequency-domain perturbation theory. The results of the model test are compared with the experimental results that the FWHM is 180 ° and the PM spectrum and white noise spectrum are used.The theoretical calculation involves the second-order slow-wave damping, and the decay test of the model on the regular wave is carried out. The form is replaced by the spring system instead of the mooring system.The damping value of the second-order slow-damping reference spring system in the frequency-domain calculation under the irregular wave test.The calculation and comparison with the experimental results show that the theoretical results and the corresponding test results are in accordance with The damping value of the spring system under irregular wave can be used as reference for the second-order slow-wave damping in the frequency domain calculation.The second-order frequency-domain perturbation theory can be used to analyze the dynamic response of the turret mooring oil tanker