Perturbative expansion and new soliton solutions of the (3+1)-dimensional Boussinesq equation in fluid mechanics
摘要
Perturbative expansion and soliton solutions of the (3+1)-dimensional Boussinesq equation are studied in the present paper. Through a perturbative expansion method, the (3+1)-dimensional nonlinear Schrödinger equation is derived. Additionally, by employing a Galilean transformation, a (3+1)-dimensional-like Korteweg–de Vries (KdV) equation is also obtained, offering a novel perspective for exploring the physical properties of the Boussinesq equation. Focusing on the soliton solutions of the equation, the modified CK (m-CK) method is employed to establish relationships between new and existing solutions, and the Hirota bilinear method to derive multi-soliton solutions, thereby enriching the solution space. These findings reveal that the new solutions exhibit improved stability and weaker interactions compared to the existing ones, highlighting their potential for practical applications.