上海交通大学学报 ›› 2021, Vol. 55 ›› Issue (8): 916-923.doi: 10.16183/j.cnki.jsjtu.2020.125
所属专题: 《上海交通大学学报》2021年12期专题汇总专辑; 《上海交通大学学报》2021年“工程力学”专题
收稿日期:
2020-05-03
出版日期:
2021-08-28
发布日期:
2021-08-31
通讯作者:
陈科
E-mail:raulphan@sjtu.edu.cn
作者简介:
郅长红(1991-),女,河北省邢台市人,博士生,从事内孤立波理论与数值研究
基金资助:
ZHI Changhong, CHEN Ke(), YOU Yunxiang
Received:
2020-05-03
Online:
2021-08-28
Published:
2021-08-31
Contact:
CHEN Ke
E-mail:raulphan@sjtu.edu.cn
摘要:
采用简化的变系数内孤立波传播方程来描述弱非线性内孤立波在不同坡度斜坡上的传播演化过程.结果表明:弱非线性内孤立波在通过斜坡的传播过程中产生了不同程度的分裂现象,分裂为首波和尾波列.在通过斜坡的传播过程中内孤立波主要受到由地形诱导产生的浅化效应和能量耗散作用.对于非线性较弱的内孤立波,地形导致的浅化效应占主导作用,振幅逐渐增大并趋于稳定,而波速逐渐减小并趋于稳定.在相同的地形条件下,随着初始振幅增大,振幅的增加量减小,波速的减小量增加.随着斜坡坡度的增大,非线性内孤立波在传播过程中受到的能量耗散作用逐渐大于浅化效应,使得内孤立波在传播过程中振幅先增大后减小.当经过临界点(上下层流体深度相同的点)后,内孤立波由下凹型转变为上凸型.
中图分类号:
郅长红, 陈科, 尤云祥. 弱非线性内孤立波在斜坡上的传播演化特性[J]. 上海交通大学学报, 2021, 55(8): 916-923.
ZHI Changhong, CHEN Ke, YOU Yunxiang. Propagation Evolution Characteristics of Weakly Nonlinear Internal Solitary Waves on Slopes[J]. Journal of Shanghai Jiao Tong University, 2021, 55(8): 916-923.
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