Utilizing continuous finite element methods of ordinary differential equation,we compute the energy error and classical trajectories of A2B molecule system,and compare to symplectic algorithm.

• 本文利用常微分方程的连续有限元法计算了A2B模型的分子的经典轨迹和能量误差；将计算延长到10-8s；并与辛算法进行了比较.