超长尺度浮式防波堤多模块耦合动力响应分析

Multi-Module Coupling Dynamic Response Analysis of Ultra-Long Scale Floating Breakwater

为研究多模块浮式防波堤模块之间的耦合动力响应规律,基于目标海域环境条件,提出一种能够提供特大掩护水域的超长尺度浮式防波堤总布置设计方案,并对超长尺度浮式防波堤的构型、连接结构及系泊系统进行设计。在此基础上,基于三维势流理论对超长尺度浮式防波堤的水动力性能进行频域和时域分析,考虑环境载荷作用下浮式防波堤多模块耦合运动,并对其中间及两侧模块的运动响应及系泊缆张力进行对比分析。研究结果表明:横浪和斜浪工况下,超长尺度浮式防波堤中间模块在垂荡、横摇和纵摇方向上的运动均最剧烈。由于防波堤首部模块在横浪和斜浪工况下横荡运动最剧烈,因此浮式防波堤首部模块迎浪运动侧系泊缆在2种工况下所受张力最大,这在超长尺度浮式防波堤系泊系统设计过程中需重点关注。数值模拟结果可为此后超长尺度浮式防波堤设计及工程化应用提供技术支撑。

In order to study the coupled dynamic response law of multi-module floating breakwater modules,based on the environmental conditions of the target sea area,A general layout design scheme of ultra-long scale floating breakwater that can provide ultra-large cover waters is proposed,and the configuration,connection structure and mooring system of ultra-long scale floating breakwater is designed.On this basis,based on the three-dimensional potential flow theory,the frequency domain and time domain analysis of the hydrodynamic performance of the ultra-long scale floating breakwater are carried out,considering the multi-module coupling motion of the floating breakwater under environmental load,and the motion response of the modules and the mooring cable tension are compared.The results show that the motion of the middle module of the ultra-long scale floating breakwater is the most intense in heave,roll and pitch direction under the conditions of transverse and inclined waves.Because the head module of a floating breakwater has the most violent rolling motion under the conditions of transverse wave and inclined wave,the mooring line of the floating breakwater head module is subjected to the greatest tension under the two conditions,which should be paid attention to during the design of the mooring system of a super-long scale floating breakwater.The numerical simulation results can provide technical support for the design and engineering application of ultra-long scale floating breakwater.