Study on Interior Ballistic Performance of Image Terminal Guided Projectile Coupled with Stabilized Structure Characteristics
Given the stable structural characteristics of the"sliding band and cylinder expansion tail",commonly utilized in terminal guided projectiles based on imaging fired by rifled artillery,this study analyzes the launch process of the terminal guided projectile,the functioning of the sliding band,and the inflation and deflation processes of the cylinder in the bore.It is established that an interior ballistic model of the image terminal guided projectile coupled with the stable structure characteristic of the sliding band and the cylinder expansion tail,and the numerical simulation study is carried out with a certain image-terminal guided projectile as an example.Through research,the variation laws of inte-rior ballistic performance,such as the pressure of propellant gas in the bore and cylinder,the velocity of the projectile,and the angular velocity of projectile rotation in the bore,are obtained.From the simulation results,the relative errors of the maximum gas pressure and the projectile velocity in the bore are determined.The calculation results exhibit a relatively high level of accuracy,and the associa-ted simulation curves align with the actual change patterns of the image terminal guidance projectile,thus confirming the model's rationality.Building on this foundation,the impact of changes in vent dia-meter and the friction coefficient between the projectile and the rear end face of the projectile ring on the interior ballistic performance,specifically on the pressure difference between the inside and outside of the cylinder and the muzzle speed of the projectile,is analyzed from the perspective of equipment design and development.The findings from this research can offer a theoretical basis and data support for optimizing the design of image terminal guided projectile structures,understanding the failure and anti-overload mechanisms of missile-borne devices,and exploring the application of other types of guided projectiles launched by rifled guns.
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维普
