基于FLUENT的海洋畸形波数值模拟研究

Numerical Simulation of Oceanic Freak Waves Based on FLUENT

近年来,由畸形波引起的海上船只遇难事件相继被报道,其越来越引起人们的关注,已成为船舶与海洋工程领域的一大热点。借助高效的相位调制畸形波模拟方法,基于FLUENT强大的建模功能和二次开发功能,建立可定时定点再现海洋实测畸形波现象的波浪数值水槽,通过对数值计算结果的时域统计分析和频域谱分析,发现数值结果不仅在波浪历时上能够很好地吻合目标波列,而且计算波浪谱也保持了目标谱的真实结构,说明了该畸形波数值水槽的有效性,为进一步研究畸形波与海上结构物之间的相互作用打下了基础。

Because shipwreck events caused by freak wave in recent years have been reported, freak wave has attracted more and more attention and has become a hotspot in the field of ship and ocean engineering. With the help of efficient phase modulation method for simulating freak waves, a numerical wave tank based on powerful modeling and secondary development function of FLUENT was established, by which the freak waves could occur at the assigned time and place. After analyzing the numerical calculation results in time domain and frequency domain, it is found that the results not only match the target wave train, but also keep the real structure of the target spectrum, it shows the effectiveness of the numerical wave tank and laying the foundation for further research of interaction between freak waves and structure of coastal and offshore engineering.