摘要
应用孤子拟解法研究了含外力项时变系数KdV方程与一类时变系数耦合KdV方程组.首先将方程经过变量代换转换为齐次方程,然后将孤子解假设为双曲正割函数的形式带入方程或方程组,最后借助Maple软件完成复杂的计算来确定假设的孤子解的待定系数,从而得到孤子解存在的条件及其孤子解.结果显示:孤子拟解法计算简便且能得到方程的亮孤子解.
This paper studied the KdV equation with time-dependent coefficients and forcing term and the coupled KdV equations with time-dependent coefficients by using soliton ansaze.Firstly,the equation was converted to homogeneous equation by using a variable transformation.Then,by assuming the soliton solutions to be the form of sech function,and with the help of Maple software,the complicated and tedious calculations were performed,and the conditions of existence of solitons and soliton solutions were obtained.The results show that the calculation of soliton ansaze is simple and can obtain bright soliton solutions.
出处
《动力学与控制学报》
2014年第2期115-118,共4页
Journal of Dynamics and Control
基金
国家自然科学基金资助项目(11162020)
云南省中青年学术与技术带头人计划项目(2008PY059)~~
关键词
KDV方程
耦合KDV方程组
变系数
孤子拟解法
KdV equation
coupled KdV equations
time-dependent coefficients
soliton ansatz
