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激光辐照参数是研究激光对飞行靶目标毁伤效应的基础,主要包括辐照中心点位置、辐照面域和功率密度分布。以激光辐照水平匀速运动和抛物线运动的旋转圆柱体靶为背景,假定激光辐照飞行靶交汇场景,给出交汇目标参数,建立激光辐照交汇模型;推导出辐照中心点位置、辐照面域和功率密度分布等辐照参数的解析表达式。仿真结果表明:辐照参数是随靶目标飞行不断变化的量;激光功率密度分布为参数不断变化的三维椭圆形高斯函数;靶目标旋转会引起辐照中心点位置和辐照面域的变化,进而对温度场分布和激光毁伤效应产生一定的影响。解析求解结果为研究激光对飞行靶的辐照效应奠定了参数基础。
The parameters of laser irradiation are the basis for studying the damage effect of laser on the target of the flight, including the location of the irradiation center, the radiation area and the power density distribution. In the background of rotating cylindrical target with horizontal uniform velocity and parabolic motion, laser irradiation target is assumed to intersect with the target, and the intersection model of laser irradiation is established. The position of irradiation center is deduced, Surface area and power density distribution and other parameters of the analytical expression. The simulation results show that the irradiation parameters are constantly changing with the target flight, the laser power density distribution is a three-dimensional oval-shaped Gaussian function with changing parameters, and the rotation of the target target will cause the change of the irradiation center point and the irradiation area, And then the temperature field distribution and laser damage effect have a certain impact. The results of analytical solution laid the parameter foundation for the study of laser irradiation target effect.