激光辐照下卫星筒体部分多物理建模及毁伤效应分析

Multi-physical modeling and damage effect analysisof satellite cylinders under laser irradiation

  • 摘要: 激光反卫星武器是干扰、破坏星载光电仪器设备或摧毁卫星平台的重要手段。基于Fourier的非稳态导热方程,结合靶材内部的实际结构和金属材料的高温特性,通过建模与数值仿真,实现了卫星筒体在激光辐照下毁伤的仿真过程,获得了典型工况下靶材的温度、熔化深度和内部应力分布等多物理变化规律。分析了不同功率密度的激光对靶材温度场和熔化速率的影响,以及靶材内部的应力耦合现象。分析结果表明:随着激光功率密度的不断升高,靶材的毁伤速率不断增加,但在相变处其熔化速率趋于稳定;同时,在典型工况下,由于应力耦合效应靶材会在极短的时间内超出许用应力值,发生损毁。

     

    Abstract: The laser anti-satellite weapons are important means of jamming and destroying space-borne photoelectric instruments or destroying satellite platforms. Based on the Fourier unsteady state heat conduction equation, combined with actual structure inside the target and high temperature characteristics of the metal material, the simulation process of satellite cylinder damage under laser irradiation was realized through the modeling and numerical simulation, and the multi-physical change laws such as temperature, melting depth and internal stress distribution of the target under typical operating conditions were obtained. The effects of lasers with different power densities on the temperature field and melting rate of the target and the stress coupling phenomenon inside the target were analyzed. The results show that as the laser power density continues to increase, the damage rate of the target increases, but its melting rate tends to be stable at the phase transition. At the same time, under typical conditions, due to the stress coupling effect, the target will exceed the allowable stress value in a very short time, and the damage occurs.

     

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