摘要
根据基于两层流体推导的深海内波弱非线性薛定谔(Nonlinear Schrodinger,简称NLS)方程,引进空间啁啾的思想,研究深海区频散效应和非线性效应的作用。文中推导出了频散效应和非线性效应所致啁啾的表达式,采用数值计算方法计算了综合效应产生的总啁啾。分析了频散和非线性以及综合效应所致啁啾在深海内波传播中的演变规律。从空间啁啾的角度,解释中国南海东沙群岛附近深海区内波演变的机理。
In the paper,according to the deep-sea internal waves weakly nonlinear Schrodinger （NLS） equation which is derived based on two-layer fluid basic equations,the effects of dispersion and nonlinearity in deep sea are tried to explain with the idea of spatial chirp.The functions of dispersion-caused chirp and nonlinearity-caused chirp are resolved,and the total chirp are calculated mathematically.Then evolutions of dispersion-caused chirp,nonlinearity-caused chirp and total chirp are analyzed.The mechanism of the evolution of internal waves around the Dongsha islands in the south China sea is explained in terms of spatial chirp.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第1期114-120,共7页
Periodical of Ocean University of China
基金
国家自然科学基金项目(61171161)资助
关键词
空间啁啾
内波
非线性薛定谔方程
深海
spatial chirp
internal waves
nonlinear Schr（o）dinger （NLS）
deep-sea
