Multiple Physical Modeling And Simulation Of High Energy Laser Weapon

With the high energy laser weapon real combat gradually, various countries in the world pay more and more attention for the advantages such as firing speed,hit rate and economic. Due to the instantly of the destroy process, the complexity of the reaction and the high cost of testing made evaluation of laser weapon damage power is very difficult through the experiment. It is effectively to control and evaluate the offensive-defensive performance by using the numerical method to modeling and simulation the destructive power. It is the basis and prerequisite that study of high energy laser weapon damage mechanism to evaluate the damage effect, based on the analysis of the damage mechanism of high energy laser weapon, calculated and analyzed the thermal and mechanical effects through the numerical simulation. The main research content is as follows:Established one-dimensional transient temperature field model on the typical working condition, verified the accuracy of the numerical solution by comparing the analytical solution, considered the change of the thermal conductivity and latent heat of fusion leaded by phase change for the influence of the temperature field distribution, and then calculated the temperature field distribution on the typical working condition.Established the displacement field model that reflect the melding depth of the target, calculated and compared with the steady state model, and then give an more accurate estimate method that can be used in engineering, in the final analyzed the influence of tangential flow for the displacement field.Established the circular thin plate stress field model and the thickness direction tube shell stress model under laser irradiation, calculated through numerical method separately on the surface stress distribution and thickness direction stress distribution for the direction of the radial, axial and circular,compared with the permissible stress in the corresponding temperature and judged damage effect.Based on the operational process of high energy laser weapon, treated as the modularity and establish the corresponding simulation module:Weapons module、Goal description filter module、Transmission and dissipation module、Laser and target function module. Calculate the temperature field, displacement field, stress field calculation for equivalent target with typical high energy laser weapon operational parameters, analyzed the factors that influence the damage power,optimized the damage power of quantitative and qualitative.