The Structure Design And Rigidity Analysis Of The Active Protection Two-dimensional Follow-up Platform

In the modern information warfare,the advance of the weapon system appeared as a great threat to combat survivability.According to the battlefield environment,a two-dimensional follow-up platform is designed to improve the protection range and launch accuracy of the active protection system of armored vehicles.Firstly,a two-dimensional active protection follow-up platform is designed.The main load imposed on the platform's structure is analyzed to select a suitable drive motor and drive mode.Mechanical properties of the important parts are checked.Based on the designed structure,static and modal analyses are performed in Ansys Workbench.The results show that the static characteristics of the structure in 0° or 30° pitch angle can meet the requirements and ensure that the structure will not be deformed by resonance.Secondly,the launching process of the defense system is discussed to yield the internal ballistic equations.The curve of recoil force vs.time of the defense system under different amount of propellant is plotted.Results yielded by solving the internal ballistic equation are used as the launching dynamic load in simulations.The transient dynamic characteristics of the launching structure in different launching angles and dynamic loads are analyzed respectively to determine the relationship between the dynamic performance,launching angle and the amount of propellant.The results show that the equivalent stress,strain,displacement and rotation angle of the structure increase with the increasing amount of propellant ranging from 8 to 12 g.The equivalent stress of the whole structure reaches its maximum value of 311.15 MPa at 0°elevation angle.While,at 30° pitch angle,the rotation angle of the emission shaft reaches its maximum value of 0.266°.After the projectile exiting the muzzle,the rotation angle reduces to 0.260°.Finally,recoil tests and stress strain test are carried out.The results verify the feasibility and accuracy of the proposed two-dimensional active protection follow-up platform.