数学物理学报(英文版) ›› 2025, Vol. 45 ›› Issue (4): 1405-1437.doi: 10.1007/s10473-025-0410-5

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NONLINEAR WAVE TRANSITIONS AND THEIR MECHANISMS OF THE (2+1)-DIMENSIONAL KORTEWEG-DE VRIES-SAWADA-KOTERA-RAMANI EQUATION

Haolin WANG, Shoufu TIAN*, Tiantian ZHANG*   

  1. School of Mathematics, China University of Mining and Technology, Xuzhou 221116, China
  • 收稿日期:2024-03-13 出版日期:2025-10-10 发布日期:2025-10-10

NONLINEAR WAVE TRANSITIONS AND THEIR MECHANISMS OF THE (2+1)-DIMENSIONAL KORTEWEG-DE VRIES-SAWADA-KOTERA-RAMANI EQUATION

Haolin WANG, Shoufu TIAN*, Tiantian ZHANG*   

  1. School of Mathematics, China University of Mining and Technology, Xuzhou 221116, China
  • Received:2024-03-13 Online:2025-10-10 Published:2025-10-10
  • Contact: *Shoufu TIAN, E-mail: sftian@cumt.edu.cn and shoufu2006@126.com; Tiantian ZHANG, E-mail: ttzhang@cumt.edu.cn
  • About author:Haolin WANG, E-mail: TS23080024A31LD@cumt.edu.cn
  • Supported by:
    National Natural Science Foundation of China (12371255, 11975306), the Xuzhou Basic Research Program Project (KC23048), the Six Talent Peaks Project in Jiangsu Province (JY-059) and the 333 Project in Jiangsu Province and the Fundamental Research

摘要: In this work, we study wave state transitions of the (2+1)-dimensional Korteweg-de Vries-Sawada-Kotera-Ramani (2KdVSKR) equation by analyzing the characteristic line and phase shift. By converting the wave parameters of the N-soliton solution into complex numbers, the breath wave solution is constructed. The lump wave solution is derived through the long wave limit method. Then, by choosing appropriate parameter values, we acquire a number of transformed nonlinear waves whose gradient relation is discussed according to the ratio of the wave parameters. Furthermore, we reveal transition mechanisms of the waves by exploring the nonlinear superposition of the solitary and periodic wave components. Subsequently, locality, oscillation properties and evolutionary phenomenon of the transformed waves are presented. And we also prove the change in the geometrical properties of the characteristic lines leads to the phenomena of wave evolution. Finally, for higher-order waves, a range of interaction models are depicted along with their evolutionary phenomena. And we demonstrate that their diversity is due to the fact that the solitary and periodic wave components produce different phase shifts caused by time evolution and collisions.

关键词: the (2+1)-dimensional Korteweg-de Vries-Sawada-Kotera-Ramani equation, characteristic line, transformed nonlinear waves, phase shift, collision

Abstract: In this work, we study wave state transitions of the (2+1)-dimensional Korteweg-de Vries-Sawada-Kotera-Ramani (2KdVSKR) equation by analyzing the characteristic line and phase shift. By converting the wave parameters of the N-soliton solution into complex numbers, the breath wave solution is constructed. The lump wave solution is derived through the long wave limit method. Then, by choosing appropriate parameter values, we acquire a number of transformed nonlinear waves whose gradient relation is discussed according to the ratio of the wave parameters. Furthermore, we reveal transition mechanisms of the waves by exploring the nonlinear superposition of the solitary and periodic wave components. Subsequently, locality, oscillation properties and evolutionary phenomenon of the transformed waves are presented. And we also prove the change in the geometrical properties of the characteristic lines leads to the phenomena of wave evolution. Finally, for higher-order waves, a range of interaction models are depicted along with their evolutionary phenomena. And we demonstrate that their diversity is due to the fact that the solitary and periodic wave components produce different phase shifts caused by time evolution and collisions.

Key words: the (2+1)-dimensional Korteweg-de Vries-Sawada-Kotera-Ramani equation, characteristic line, transformed nonlinear waves, phase shift, collision