计算物理 ›› 2018, Vol. 35 ›› Issue (2): 178-186.DOI: 10.19596/j.cnki.1001-246x.7617

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KdV-Burgers方程行波解的稳定性

石玉仁1, 封文星1, 席忠红1,2, 宗谨1,2, 宋宗斌1, 庞军刚1   

  1. 1. 西北师范大学 物理与电子工程学院, 兰州 730070;
    2. 甘肃民族师范学院 物理与水电工程系, 合作 747000
  • 收稿日期:2017-01-03 修回日期:2017-05-03 出版日期:2018-03-25 发布日期:2018-03-25
  • 作者简介:石玉仁(1975-),男,博士,教授,主要从事非线性物理和计算物理的研究,E-mail:shiyr@nwnu.edu.cn
  • 基金资助:
    国家自然科学基金(11565021,11047010)及西北师范大学青年教师科研能力提升计划(NWNU-LKQN-16-3)资助项目

Dynamical Stability of Traveling Wave Solutions to KdV-Burgers Equation

SHI Yuren1, FENG Wenxing1, XI Zhonghong1,2, ZONG Jin1,2, SONG Zongbin1, PANG Jungang1   

  1. 1. College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
    2. College of Physics and Hydropower Engineering, Gansu Normal University For Nationalities, Hezuo 747000, China
  • Received:2017-01-03 Revised:2017-05-03 Online:2018-03-25 Published:2018-03-25

摘要: 对KdV-Burgers方程的行波解进行线性稳定性分析,数值结果表明:对于正耗散情形,其行波解是稳定的;对于负耗散情形,其行波解是不稳定的.其次构造有限差分法对其行波解进行非线性动力学演化,结果表明:对于正耗散情形,KdV-Burgers方程的行波解是稳定的.本文结果修正和完善了相关文献中所得结论.

关键词: KdV-Burgers方程, 行波解, 稳定性

Abstract: We made linearization stability analysis on traveling wave solutions of KdV-Burgers equation. Numerical results indicate that traveling waves are dynamically stable for positive-dissipation case, while they are dynamically unstable for negative-dissipation case. Then we presented a finite difference scheme, which is conditionally stable, for long-time evolution of perturbed traveling waves. Numerical results also show that traveling waves are dynamically stable as positive-dissipation is held. Our results modify and improve conclusions given in relative literatures.

Key words: KdV-Burgers equation, traveling wave solution, dynamical stability

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