Experimental And Simulation Study On The Explosive Cluster Warhead Dispersion System

For the issue about explosive cluster warhead dispersion system, a kind of high strength and mould composite gasbag was designed. A novel method using experimental study, numerical simulation, and theory analysis was applied to investigate the characteristics of the static deformation process of gasbag. Based on this research the interior ballistic and dynamic dispersion processing of the gasbag dispersion system were analyzed. It also can supply important reference and theory basis for gasbag dispersion system research. The major works were done in this thesis as follows.(1)The gasbag made by high strength and mould textile reinforced composite was designed. Through the structural design of reinforced material selection and production process improvement techniques such as approach, developed the high bearing pressure capacity of lining fabric reinforced composites gasbag. In order to analysis the gasbag axial tensile mechanical properties of materials, processed gasbag sample and tensile test, then tensile ability and failure law of the gasbag was obtained. The data are important for research and application of the gasbag.(2)In order to study the static performance of the gasbag, a static experimental system was designed. Through the central control system controlled pressurized static process, with the aid of pressure test system and image collection system recorded the change of the gasbag pressure and deformation process, the static loading capability of the gasbag was obtained. Based on temperature shock test and pressurizing test, analyzed the gasbag working status and changes of loading capability. These results supply checking and verifying basis for gasbag factory production.(3)The static deformation process of the composite gasbag was simulated. The computational solutions are well consistent with the experiment results which prove the numerical method are validity. Considered the material of the gasbag and combined with composite mechanical theory to describe the textile and rubber material through the relationship between transverse isotropy and Mooney-Rivlin constitutive relations. Based on LS-DYNA finite element software, by the method of nonlinear finite element analysis simulated and analyzed static deformation process. The computational results revealed the characteristics of process which were found to be good agreement with the experimental data. The results supply practical reference value for enhancing gasbag loading capability and optimizing gasbag structure design. (4) The interior ballistics and dynamic dispersion process of explosive cluster warhead gasbag dispersion system were designed. A dynamic experimental platform was designed according to the characteristics of gasbag dispersion in order to research the process of gasbag dispersion system. This platform implements the whole interior ballistics and dynamic dispersion process from ignition power been ignited, then diaphragm breaking pressure and powder burn in entire gas generator, high-temperature and high-pressure gas flow into gasbag, gasbag inflation push sub-projectile motion, hoop steel broken and last sub-projectile detach from the gasbag. Some experimental data is obtained, such as internal pressure of gas generator and gasbag, force on the sub-projectile and hoop steel, and acceleration of sub-projectile. The research provides experimental basic for explosive cluster warhead dispersion structure design and dispersion technology research.(5)The results of gasbag dispersion system were summed up to establish a numerical simulation model. Internal ballistic calculation model were adopted to simulate the process of powder burning and flow, through the finite element method to simulate the interaction between parts within the system. It has important significance for engineering application and theory research.