Dynamic Characteristics Analysis Of An External Energy Automatic Cannon Based On Bond Space Theor

In this paper,a foreign energy automaton is designed on the background of a foreign energy automatic gun project.And on the basis of the design combined with the work characteristics of the automatic gun,taking the recoil buffer device,automaton system and ammunition feeding system as the main research object,the recoil dynamic characteristics change,the positioning stability of key components and the driving characteristics of ammunition feeding system under the continuous firing state of automatic gun are studied.Based on the original theory of bonding space,a new method for complex contact components is proposed.Compared with the original bond space model,it contains the main structural characteristics of the target components and can deal with the contact relationship between components more simply.The projectile wheel positioning model and the whole gun dynamics model were established and the dynamic description of ammunition feeding system under the recoil state of the whole gun is realized.The influence of different follower motion laws on the positioning characteristics of projectile wheel and the influence of projectile number and initial pressure of recoil buffer system on recoil characteristics of whole gun were investigated,the cam curve was determined,and the method of adjusting recoil characteristic value of whole gun was put forward.The main contents of this paper are as follows:(1)On the basis of the existing modeling method of bonding space theory,a new method for complex contact components is proposed.The components with complex contact conditions are simplified into rigid connectors composed of centroid and a number of contact feature points,thus retaining the structural characteristics of the complex components and taking the closed elastic belt system as an example,the process of component jointing is described.(2)By describing the mechanical structure of a certain foreign energy automatic gun and analyzing the recoil buffer device,ammunition feeding device and CAM automata principle,the bond space model of a certain foreign energy automatic gun is established comprehensively.The state equation of the dynamic system of an external energy automatic gun is derived,the computer modeling and dynamic simulation of an external energy automatic gun are realized and the correctness of the model is verified.(3)The positioning characteristics of cam curves with different degrees are analyzed,and the motion law of follower is determined comprehensively according to the system requirements,which improves the positioning stability of projectile wheel.According to the simulation data,the influence law of the number of ammunition and the initial pressure of recoil buffer system on recoil characteristics of the whole gun is explored,and the method of controlling recoil characteristics by adjusting the initial pressure of recoil buffer device is proposed.According to the recoil characteristics,the supporting structure of the accompanying cartridge is improved.