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风浪超射现象的研究Ⅱ.动力学分析
文凡
青岛海洋大学物理海洋实验室 青岛266003
摘要:
以子波变换分析高频组成波周期信息并对超射现象进行动力学研究。高频波相位相互耦合,其能量变化以主频波周期为特征时间尺度。主频波对高频波有调制作用并可导致高频波的混沌运动。高频波在混沌海中破碎机会较多,始终不能积累较高的能量,其能量低于其作为主频波时具有的能量。
关键词:  超射  子波变换  调制
DOI：10.11693/hyhz200006014014
分类号:
基金项目:国家自然科学基金资助项目，49776285号
A STUDY ON OVERSHOOT PHENOMENA IN WIND-WAVES Ⅱ.DYNAMIC ANALYSIS
WEN Fan
Laboratory of Physical Oceanography,Ocean University of Qingdao,Qingdao,266003
Abstract:
A study is made on the overshoot phenomena in wind waves. The time scale of the energy variation of high frequency waves were analyzed using wavelet transform. The phases of waves with different frequencies were found to be coherent. High frequency wave components were modulated by, peak frequency wave. A dynamical model was constructed describing the modulation. The high frequency waves may fall into the “chaos sea” in response to the existing wind and the modulation. In “chaos sea” high frequency waves break frequently and cannot accumulate energy. At overshoot stage the frequency of the component is very close to the peak frequency of the spectrum. There is no chaos sea, at overshoot stage and the energy can be accumulated.
Key words:  Overshoot, Wavelet transform, Modulation
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