针对激光对低慢小目标材料的毁伤问题，采用有限元方法，建立激光辐照平板表面激发瞬态温度场的三维模型，对激光烧蚀尼龙材料的温度场变化进行数值模拟。得到了不同时刻材料表面温度场和烧蚀场分布，研究了辐照时间对材料损伤和烧蚀过程的影响，并进一步讨论了光束分布形式、光斑半径对温度场的影响。

To study the damage to composite material of lowslowand small target caused by laser irradiationa model of threedimensional transient temperature fields of the irradiated surface was investigated by using a finite element methodand numerical simulation was performed on temperature fields of nylon materials irradiated by a laser beam.The distribution of temperature field and ablation field at different time was obtained.The effect of irradiation time on material damage and ablation process was also analyzed.Furthermorethe influence of the beam distribution and spot radius to temperature fields was discussed.