Research On Numerical Simulation Technology Of Damage Effectiveness Of Anti-aircraft Gun Weapon System

The research of target vulnerability/weapon lethality（V/L）is of great significance to improve the air defense capability of anti-aircraft gun weapon system and the survivability of air targets.The research of V/L runs through the whole process of weapon demonstration,development and operational application.Numerical simulation is a technology to study engineering and physical problems based on physical and mathematical models and relying on electronic computers through numerical calculation and image presentation.In this paper,the numerical simulation technology is applied to the field of V/L calculation,and a set of numerical calculation method of damage effectiveness of anti-aircraft gun weapon system based on shotline is developed,which enriches the research means of V/L.The main research work of this paper can be summarized as the following three aspects:1.In V/L research,determining the initial state of projectile rendezvous with target is the premise of target vulnerability research,and determining the initial state of projectile rendezvous with target is to describe the process of warhead launching to explosion.The main contents of this paper include: define a series of coordinate systems and their mutual transformation relations,and realize the dynamic intersection between the damage element and the target;Based on the theory of firing predicded point solution and firing error analysis,the relative position of projectile and target at predicded point is determined,and the finite bursting point grid method is proposed to solve the problem of integrating vulnerability into infinite space.The power field of warhead is described by radiative shotline,which lays a foundation for the prediction of hit quantity and damage of target components.Triangular shell mesh is used to describe the geometry of the target,and the bounding volume of the target is introduced to accelerate the collision detection between the damage element and the target element system.On the basis of the traditional theory of target damage tree,this paper uses directed acyclic graph to describe target damage tree innovatively,and transforms the complicated logic of dealing with damage tree into solving directed acyclic graph.2.On the basis of the four traditional target vulnerability model,established the target vulnerability general model based on the shotline,the applicability of models is stronger,the connotation of the model include: consider penetration and ricochet phenomenon of damage element,based on computer graphics to realize the dynamic rendezvous simulation of damage elements（fragments）with the target,to predict hit number and component damage;The kronecker product was used to enumerate the component damage state automatically,and the component damage state index criterion for determining the damage tree was unified.Combined with the solution of the directed acyclic graph of the damage tree,a set of vulnerability calculation method for a single hit was established for the radial shotline.On this basis,markov chain method is used to solve the problem of calculating the multi-hit vulnerability.3.On the basis of the above theoretical study,based on the needs of V/L researchers for this kind of simulation software,cleared about the functional requirements of simulation software,designed the overall framework of the software,produced the core calculation module of code using MATLAB software,and made the GUI of software,finally,the simulation software is used to calculate an example,and the effectiveness of the algorithm is verified.