Research On Target Damage Calculation Method And Simulation Design Based On The Finite Element Analysis

The target damage efficiency is a key content in weapon testing field to assess new weapon damage performance. The high altitude burst point damage system exist high speed target, random burst point distribution and extensive fragment distribution, under this condition, the damage mechanism of high speed dynamic target is much more complex than the distance determined burst damage. Therefore, the standard methods and auxiliary simulation means of high altitude and high speed dynamic proximity target damage efficiency assessment are formed through the research of high altitude and high speed target damage.According to the target damage mechanism, the target vulnerability model is established by using the finite element analysis method. The target vulnerability area, the burst point coordinates and the fragments space coordinates are calculated through the Monte Carlo method and the space tangential differential method. The calculated single fragment coordinates and the target single vulnerable surface area can be taken to study the damage probability of a single vulnerable surface area which caused by a single fragment, then, the whole target damage probability can be obtained by summing the damage probability of each single vulnerable surface area. The space tangential differential surface area is proposed to calculate the target damage probability distribution of multiple projectile fragments, for obtaining a new method to evaluate the target damage efficiency. The space tangential differential surface area calculation model of target damage is analyzed of the established according to the dynamic parameters of multi-fragments. Based on the spatial distribution density of projectile multi-fragments, the target damage efficiency calculation principle and method of multi-fragments in the 3-Dspace is analyzed, the interaction extent function about multi-fragments and target unit area is deduced, and the calculation function of target damage distribution probability is given on the basis of spatial distribution range parameters of multi-fragments. The finite element analysis model of the projectile fragment and target is established on the basis of the ANSYS software, and the simulation of a single fragment penetrated the target surface is finished. The damage assessment algorithm is provided by the parameters in the process of missile target encounter and the target damage grade standards. The 3D model of projectile, target and terrain are established by using the Creator software, and the corresponding processing program is written in the Microsoft Visual Studio 2005. Then, the high-speed and high-altitude proximity target damage dynamic simulation design is realized by using the Vega Prime, which is a real-time 3D virtual reality development software.The simulation results verified some conclusion, when the size of fragment is fixed, the target damage distribution probability is proportional to the fragments spatial distribution density. When the target damage probability is greater, then the target will be damaged more seriously.