畸形波生成、演化过程研究——波面时间过程随位置的变化

摘要

Simulations of generation and evolution of freak wave were carried out based on a fully-nonlinear numerical model. The process of water surface elevation and parameters of freak wave were analyzed consequently. The results showed that freak wave was not an independent abnormal phenomenon, but was very likely accompanied by the successive large waves (huge wave sequence) and deep trough. The potential threat to vessels and maritime structures caused by the combined effect of the extreme waves and deep trough might be far beyond a transient freak, which should be paid more attention.%基于完全非线性波浪数值模型,模拟实测畸形波的生成、演化过程,进而分析波面时间过程和畸形波参数的变化规律.研究结果表明:在畸形波形成前、后均可能出现连续的大波和“深谷”现象.在畸形波生成、演化过程中出现的“深谷”和畸形波具有伴生性而非独立异常波浪现象.上述大波、“深谷”和畸形波的连续作用对海洋结构物和船舶造成的潜在威胁可能远超过“瞬态”畸形波,此点应引起高度重视.