Abstract: Based on the three-dimensional potential flow theory, the hydrodynamic research of the cylindrical floating breakwater was carried out by the method of numerical analysis, which was by use of the hydrodynamic analysis software AQWA. The amplitude response operators of the breakwater under different wave directions, the additional mass at different water depths, the motion response of the breakwater, and the cable tension were obtained by calculation. The research results show that the sway, surge and heave motions of the proposed floating breakwater are mainly caused by low-frequency motions. Since the mooring lines are mostly bow and stern lines, the amplitude of the surge motion of the floating body in the time domain is relatively small, which is one order of magnitude smaller than the amplitude of the sway and heave motions.

Key words: port engineering; three-dimensional potential flow theory; floating breakwater; amplitude response operator; additional mass

摘要： 利用水动力分析软件AQWA，基于三维势流理论，采用数值分析法对圆筒型浮式防波堤进行了水动力研究；计算得到了不同浪向下的防波堤幅值响应算子、不同水深下的附加质量、防波堤运动响应和缆索张力。研究结果表明：本浮式防波堤横荡、纵荡与垂荡运动主要由低频运动引起；由于系泊缆多为艏缆和艉缆，因而浮体纵荡运动时域幅值较小，相较横荡与垂荡的运动幅值小一个数量级。

关键词: 港口工程；三维势流理论；浮式防波堤；幅值响应算子；附加质量