Method for calculating temperature field of laser ablation carbon fiber target material

Abstract

The invention discloses a method for calculating a temperature field of a laser ablation carbon fiber target material, and relates to the field of laser damage effect research, and the method comprises the following steps: 1, carrying out the equal-thickness layering according to the shape of the carbon fiber target material, and dividing grid units; 2, setting the laser action time t to be equalto 0, setting a time interval delta t, and applying an initial condition and a boundary condition to the unit according to the thermophysical parameters of the carbon fiber target material; 3, settingt= t + delta t, solving three-dimensional heat conduction transient equations of anisotropic materials of all units, and calculating a target material temperature field after time t; 4, if a grid unit with the temperature exceeding the vaporization threshold temperature of the carbon fiber target exists, vaporizing the unit according to a meta-order stripping method, loading the corresponding boundary condition to the next layer of unit, and then executing the step 5; 5, traversing the grid units: judging whether a next layer of unit exists, if yes, adjusting the thermophysical parameters ofthe target material, updating the boundary condition and the initial condition, and then executing the step 3; otherwise, determining a fact that the time and the temperature field are the characteristic parameters of the laser damaged carbon fiber target material.

Description

technical field [0001] The invention relates to the field of laser damage effect research, in particular to a calculation method for the temperature field of a laser ablation carbon fiber target, which is used for calculating the real-time temperature field and burn-through time of a high-energy laser damage carbon fiber target. Background technique [0002] In recent years, the damage of UAVs and other targets by high-energy laser weapons has become a research hotspot. Among them, the numerical calculation of laser damage plays a very important role in the pre-war prediction and wartime monitoring of laser weapons destroying UAVs. The research on laser irradiation target materials at home and abroad mainly focuses on metal shells, and there are few studies on fiber-reinforced composite materials, especially carbon fiber composite materials for laser irradiation, while the materials used in drones are mainly composed of carbon fiber composite materials. . Carbon fiber compo...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that in the prior art, when calculating the temperature field and burn-through time of the laser ablation carbon fiber target, the delamination of the element sequence after the surface of the carbon fiber target exceeds the threshold temperature of self-vaporization and the change with temperature are not considered. The thermophysical properties of the carbon fiber target caused the low accuracy of the carbon fiber temperature field distribution and the inaccurate calculation of the burn-through time in the numerical calculation process. A calculation method for the temperature field of the laser ablation carbon fiber target is provided.

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