聚焦波作用下浮式防波堤运动响应及波浪砰击研究

Research on motion response and wave impact on floating breakwaterunder focused waves

波浪砰击荷载分布及运动响应特征是浮式防波堤设计的关键因素,聚焦波由于波陡高、破坏力强,严重影响海洋结构安全。采用光滑粒子流体动力学方法,建立了能够模拟波浪-浮体相互作用的耦合模型,基于建立的耦合模型分析了聚焦波作用下浮式防波堤的运动响应及砰击荷载变化特征,对比论证了聚焦波作用下防波堤迎浪侧与背浪侧系泊缆受力差异。研究结果表明,波浪砰击荷载最大值出现在防波堤迎浪侧的最低点,聚焦波作用下浮式防波堤的纵荡呈现出非对称性特征,砰击荷载、系缆拉力在浮式防波堤迎浪侧与背浪侧存在较大差异。

The distribution characteristics of wave impact load and motion response are the key factors in the design of floating breakwater.The focused wave is of high height and great destructive force,significantly impacting the safety of marine structures.In this paper,smooth particle hydrodynamics was adopted and a coupled hydrodynamic model,which can simulate the interaction between wave and floating body,was proposed.Based on the proposed model,the distribution characteristics of wave impact load and motion response were analyzed.The results show that the maximum wave attack load occurs at the lowest point of the wave-facing side of the breakwater.The longitudinal characteristics of floating breakwater under the action of focused waves are asymmetrical.Wave impact loads and mooring tensions are quite different between the wave-facing side and the backside of the floating breakwater.