浅水FPSO舷侧波浪数值模拟

Numerical simulation of wave elevations along FPSO broadside in shallow water

单点系泊FPSO具有风标效应,因此船首迎浪时的甲板上浪问题广受关注,然而在非共线海况下斜向迎浪时,会存在舷侧甲板上浪现象。基于FLUENT软件,建立三维数值波浪水池,对浅水中的FPSO在首迎浪、首斜浪时舷侧附近的波浪变形和波浪爬升现象进行数值模拟,对舷侧甲板上浪特性进行研究分析。结果表明,首迎浪时舷侧波浪爬升和甲板上浪不明显,首斜浪时波浪爬升主要集中在船舯附近,舷侧波浪受到反射波叠加的影响,波浪水体形成堆积和爬升,导致舷侧比船首更容易发生甲板上浪。

Green water at the bow is an important topic for a single point moored FPSO due to the weathervane effect.However,in non-collinear environments,the FPSO will be exposed to oblique waves and green water will exist along the broadside.Three-dimensional numerical wave tank is established by using FLUENT software to simulate the wave propagation and wave elevations near the FPSO broadside for both head and oblique wave conditions.It can be seen that the wave run-up and green water along the broadside are not obvious in head sea condition but significant in oblique sea condition.The wave run-up and green water occur more severely around the midship where the water accumulates from incident waves and reflective waves.