Research on dynamic characteristics of gun turret under launching load

Abstract

The purpose of this study is to further study the dynamic characteristics of gun turret under firing load. Firstly, the relative motion between inner ring and outer ring was decomposed into axial translational motion, radial translational motion and rotational freedom in two orthogonal radial planes in order to solve the problem of large number of ball bearings and complex contact calculation in the actual structure of turret ring. Then, the equivalent dynamic mathematical model of turret ring was established. Based on the finite element method, the turret ring is equivalent to Bushing with body-body connection type, Multi-point constraints algorithm and Deformable Behavior attribute. The equivalent stiffness of the turret ring is set as linear stiffness, and the turret dynamic model is established. The dynamic response simulation of the turret under the action of firing load was carried out. The acceleration sensor was arranged at the left trunnion position of the turret, and the acceleration generated by the transient force during firing was measured at the left trunnion position. The results showed that the test value of the acceleration at the left trunnion position was 1304.38m /s2,the simulation value of the turret dynamic model is 1425 m/s2, and the error is 8.46%, which verifies the accuracy of the turret dynamic model and indicates that the turret dynamic model can reflect the dynamic characteristics of the turret well.