激光作用下低慢小目标尼龙材料温度场分析

Numerical Simulation on Temperature Fields of Nylon Materials of Slow Small Target Irradiated by Laser Beam

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.