Research On The Composite Material Launching Tube Of A Kinetic Energy Smashing Projectile

Based on the "Davis" equilibrium projection principle,a composite launcher can emit micro-sound,micro-light and micro-smoke.When the projectile is launched,the front and rear closed gas pistons push the projectile and the balance body to the two ends of the launcher respectively.The pistons are braked after contacting the deformation ring and are left in the barrel to seal the powder gas.During the whole launching process,the composite barrel bears the combined effects of large transient gas pressure,axial braking force and contact impact force between the projectile and the tube.The dynamic response of the composite barrel is the key to the performance of the weapon system.In this paper,the composite material barrel formed by glass-carbon fiber hybrid winding is taken as the research object.Through the structure analysis of composite launcher,the design of forming technology and process parameters,and the modeling analysis of finite element display dynamics,the composite launcher which meets the requirements of the index is designed.Provide theoretical guidance and feasible plan for the development of similar projects.The main contents are as follows:(1)The development and application status of composite materials at home and abroad are expounded from the aspects of component materials and molding process.The structural design and strength checking analysis of composite barrel are summarized.(2)According to the technical index and structural characteristics of composite launcher,combined with the strength theory of composite materials,the design emphasis and key technology of composite launcher are proved.On the premise of fully understanding the design ideas of power components,brake components and projectile balance body,the appropriate design theory and design scheme are selected.Prepare for the follow-up design and analysis.(3)The composite barrel is composed of metal embedded parts and filament winding layer,and the filament winding layer is formed by hybrid winding of high-strength glass fiber and carbon fiber.By study the theory of filament winding forming and the knowledge of material properties,mechanical properties and strength theory of composites,the suitable winding laying scheme and molding process parameters are designed.(4)The composite barrel is subjected to the comprehensive effects of transient high pressure propellant gas,axial braking force and contact impact force between the projectile and the tube.Its dynamic strength is very important to ensure the launching safety.The main components of the weapon system are discretized by using ABAQUS finite element simulation analysis software,and the display dynamic finite element model of the launching system is established by writing user-defined dynamic load subroutine.The dynamic launching process of the projectile is simulated,and the dynamic strength of each layer in the composite barrel is checked.The accuracy of finite element simulation is verified by comparing the simulation results with the experimental results.The research work in this topic can provide theoretical guidance for the structural design,molding process parameters optimization and structural strength checking of composite barrel.It is of great significance to optimize the design process of composite structure and improve production efficiency.