Design Of Internal Weapons Cavity And Analysis On Submunition Separation

With the progress of science and technology, modern warfare has evolved into tridimensional high-tech and information war, and the possess of air superiority means controlling the whole war, therefor all countries actively carry out advanced air force development effort. However, owing to the development of air defense force, the scope of the battlefield increase greatly, in order to adapt to this change, the major military powers are developing stealthy advanced fighter planes, standoff missiles and high survivability unmanned aerial vehicles. Above mentioned aerocrafts need hypervelocity, high maneuverability and stealthy, which require internal weapon carriage. Thus the research of the internal weapons’ cavity has practical values and instruction significance.In this paper, aiming at this demand and based on the development status of weapon bays, designed a circular cross-section internal weapons’ cavity and analyzed the submunition separation. The main work was as follow:The basic development status involved in internal weapons’ cavity, standoff missile, suspension launching device and intelligent submunition are summarized, which supplies the essential reference for the design and simulation.According to the design requirements, the conceptual design of submunition layout, rotating rack structure, cabin structure and actuating device were proposed. Then on the basis of the conceptual design, the structure design and the geometric models were built. The analysis of the structural strength of key components indicated that the structural strength was satisfactory.Dynamics analysis of the single submunition separation without aerodynamic force was carried on and the results indicated that the effects on the submunition of the initiating explosive force and constant force were the same.Based on UDF and dynamic grids technology, aerodynamic analysis of the single submunition separation was conducted by using computational fluid dynamics method. The results showed that larger force on the submunition brought to better consequence of separation from the internal weapons’ cavity.This research enriched the internal weapons’ cavity technology to some extent, and provided an engineering practicality reference for structure design and submunition separation from weapons bay.