Research On Projectile Buffing Technology Of Air Cannon

Air cannon is a kind of general high overload simulation test equipment,which uses compressed air as the power to push the projectile to hit the target then generate high overload.It has a long service life and can meet the requirements of most high overload experiments.which is suitable for many test occasions.In the process of experiment,the residual kinetic energy after projectile collision needs to be absorbed in a certain way.At present,the laboratory only uses cushioning materials,such as felt pad,rubber block,etc.Limited by the mechanical performance of the material itself,the buffering effect is difficult to control,and the flying wool and dust will also pollute the environment of laboratory.At the same time,the setting of buffer block depends on the experience of test preparation crew,the buffer effect is difficult to control.These factors will have a certain impact on the test results.According to the buffer requirements of air projectile and test structure,a hydraulic buffer device suitable for a certain type of air gun target chamber is designed.The buffer device is based on the recoil brake of the control rod gun.Firstly,the structure of the main working parts of the buffer device is designed,the basic parameters are determined,and the three-dimensional design of the gas-liquid buffer device is completed.Then,based on the scheme of buffer device,the numerical model of buffer device is established by using the related hydrodynamics and mechanics knowledge,then the mechanical and kinematic parameters of buffer process are solved by a certain method.Then,based on the numerical model came up in this paper,some useful conclusions are obtained by studying the influence of some characteristic parameters of the buffer device during the collision buffer process.Then the genetic algorithm is used to optimize the hydraulic buffer device and improve the mechanical properties of the buffer device.On this basis,a flow regulation structure is added to the damping port.The influence of damping port is simulated,and the rules are summarized.A table for the reference of the experimental personnel is also completed.A better buffer device scheme has been come up.At last,a user interface is compiled for the genetic algorithm and then compiled the algorithm into an independent optimization application.Through the above research and analysis,this paper finished a buffer device which can adjust the mechanical properties.Through the corresponding simulation and analysis,it can be known that the scheme can meet the required technical indicators.The conclusions and results in this paper also have some reference value for the design of buffer device.