采用有限差分法对约化后的双温方程进行数值模拟．研究了飞秒激光与金属铜相互作用时，脉冲形状对烧蚀结果的影响．结果表明：脉冲能量确定时，脉冲形状对烧蚀结果影响不大；多脉冲作用时，脉冲重复频率只有在一定范围内(随材料属性改变)，脉冲间的热累积效应才存在；对传导性好的金属材料，热累积效应不明显．并实验证实了上述结果．

The Double-Temperature Equation(DTE)was simulated with the finite difference method,which was formatted simply. The effect of the pulse shape on the ablation results had been studied when the femtosecond laser was irradiated on the copper surface. The simulation results show that if the laser pulse energy is not changed,the effect of the laser shape will be ignored. And if there are several laser pulses irradiated on the material,the thermal incubation effect would occur only when the repetition rate is in a scale(which is changed with the character of the materials). For the materials that have good conductivity,such as metals,the thermal incubation effect is not clear. Experiments show the same results.