以某大型浮船坞为研究对象，对极端海况下系泊浮船坞的动力响应进行分析。通过将绕射辐射单元与莫里森单元相结合建立浮船坞-系泊系统耦合动力计算模型，基于水动力分析软件Aqwa模拟在极端海况下系泊浮船坞的运动，综合考虑风载荷、流载荷及随机波浪载荷的共同影响，计算在不同入射角的波浪作用下系泊浮船坞的六自由度运动响应幅值算子( RAOs)和动力响应，并分析水深和吃水等环境因素对浮船坞的运动和动力响应、系泊链的应力的影响规律。研究表明：浮船坞纵、横荡及横摇对波浪频率有更敏感的响应；在不同吃水深度、不同波浪方向下浮船坞六自由度的RAOs具有高度一致；随着水深的增加，浮船坞运动时域的纵荡、垂荡、纵摇、首摇振动周期越长，振动频率越低。
A large floating dock is taken as example to analyze the dynamic response of the mooring floating dock under extreme sea conditions. A coupled numerical method to calculate the dynamics on floating dock-mooring system is established by combining the diffractive radiation units with the Morrison’s ones. Based on three dimensional potential flow theory, the motion of mooring floating dock under extreme sea conditions is simulated by using a general commercial code Aqwa. The six-degree-of-freedom motion response amplitude operators (RAOs) and dynamic response of the mooring floating dock under the action of waves with different incident angles are calculated by considering the effects of loads of wind , flow and random wave, at different incident angles. The influence of environmental factors such as water depth and draft on the motion and dynamic response of the floating dock and the stress of the mooring chain is analyzed. From the numerical results, it is shown that the surging, swaying and rolling of the floating dock respond more sensitively to the wave frequency. Six degrees of freedom RAOs in floating docks with different wave directions at different drafts are highly coincident. As the water depth increases, the longer the period of vibration for surging/heaving/pitch/yawing of the floating dock motion time domain, the lower the vibration frequency.
2023,45(1): 50-56 收稿日期：2022-03-22
DOI：10.3404/j.issn.1672-7649.2023.01.010
分类号：U673.332
基金项目：浙江省基础公益研究项目(LGG18E090002)；舟山市科技计划项目 (2019C31062)；国家自然科学基金资助项目(51809236)
作者简介：董明海(1979-),男,硕士,副教授,研究方向为船舶与海洋结构物水动力性能
