浅水中浮式栈桥单浮箱系泊系统及运动响应特性

Research on mooring system and motion response character of pontoon in floating pier system in shallow water

基于三维势流理论,利用水动力分析软件AQWA对浅水中浮式栈桥单浮箱系泊系统及运动响应进行研究.对初步设计的多种系泊系统进行优选,并计算浮箱在最优系泊系统下的运动响应幅值算子RAO.结果表明：聚酯缆材料极易疲劳破坏,浅水中交叉型半张紧式锚链系泊表现出良好的系泊性能.浮箱的振幅响应算子RAO与波浪周期变化及波浪作用方向有不可分割的关系,当波浪入射角为120°～150°;时,浮箱的纵荡及纵摇RAO较大.为保证较小的垂荡值,浮箱布置可沿入射波方向.为保证较小的首摇角,浮箱布置应避免与来浪呈120°;的入射角.

This article was based on three-dimensional potential flow theory, software AQWA was used to research mooring system and motion response of pontoon in floating pier system in shallow water. A variety of preliminary designed mooring systems were optimized, in addition, motion response amplitude operator （RAO） under the most optimal mooring system was calculated. The results showed that polyester would easily lead to fatigue damage, half- taut crossing chain mooring system in shallow water showed good performance. The RAO had an inseparable relationship with wave periodic variation and wave direction. When the incident angle of wave was from 120° to 150°, the surge RAO and the pitch RAO of pontoon was greater. In order to ensure the smaller heave response value, pontoon could be arranged along the incident direction of wave. What＇s more, the pontoon should not show 120° with the wave, so that it will present a smaller yawing angle.