利用波浪频谱数值模拟畸形波的方法探究
Numerical simulation of freak waves with spectral methods
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摘要: 畸形波是一种特殊的波浪,它的波高极高,波峰尖瘦,能量很集中[1].图1是一个比较典型的畸形波[1],这个波列的有效波高是5.65 m,而其中的畸形波波高是有效波高的3.19倍,达到了18.04 m,波峰的高度是13.90 m,波的周期是9.8 s,畸形程度很大.最有名的畸形波是图2给出的1995-01-01-15:20在北海Draupner石油平台记录的波高25.6m的“新年波”,1 200 s长的观测记录显示当时的有效波高是11.92 m,波峰的高度达到18.4 m.由水深70 m,畸形波的特征周期12 s,根据线性色散关系得出波长为220 m.
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关键词:
- 畸形波 /
- 数值模拟 /
- Longuet-Higgins模型 /
- “新年波”
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Key words:
- freak waves /
- numerical simulation /
- Longuet-Hinggins model /
- New Year wave
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