基于二阶平均向量场方法和拟谱方法构造BBM方程的多辛整体保能量格式.利用构造的多辛整体保能量格式数值模拟方程孤立波的演化行为.数值结果表明构造的多辛整体保能量格式可以很好地模拟BBM方程孤立波的演化行为,并且可以精确保持方程的能量守恒特性.
The multi-symplectic global energy-preserving scheme for the BBM equations is obtained by applying the second order average vector field method and the Fourier pseudospectral method. The multi-symplectic global energy-preserving scheme is applied to simulate the evolution behaviors of the equation. Numerical results show that the global energy-preserving scheme can well simulate the solitary wave evolution behaviors of the BBM equations in long time and preserve the global energy conservation.