利用四阶平均向量场方法和拟谱方法构造非线性四阶薛定谔方程的高阶保能量格式,并用构造的高阶保能量格式数值模拟方程孤立波的演化行为.结果表明:新的格式具有很好的稳定性,可以很好地模拟孤立波的演化行为,同时,保持了方程的离散能量守恒特性.
The fourth order energy preserving scheme for the nonlinear fourth-order Schr?dinger equation is obtained by applying the fourth order average vector field method and the Fourier pseudo spectral method.The new fourth order energy preserving scheme is applied to simulate the solitary wave behaviors of the equation.Results show that the new scheme has nice stability and can well simulate the solitary wave evolution behaviors,moreover,it preserves the discrete energy conservation.