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。
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.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2000年第6期671-675,共5页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金资助项目 !4 97762 85号
