Study of seat dynamics under transient strong impact load

Abstract

The turret seat ring assumes an important load transfer role in the gun firing process, and its stiffness has a great influence on the muzzle vibration response. Based on the basic theory of nonlinear finite element method, this paper establishes a high-precision refined finite element analysis model of the seat ring based on the contact and collision between the ring and the steel ball, the steel ball and the fixed ring, and the fitting gap between the steel ball and the ring and the fixed ring, and characterizes the equivalent stiffness of the seat ring by its axial equivalent stiffness, radial equivalent stiffness and overturning equivalent stiffness. The dynamic response is obtained by simulation. The results show that the axial equivalent stiffness, radial equivalent stiffness and overturning equivalent stiffness of the seat ring are non-linear in a certain load range, and the equivalent stiffness changes linearly and steadily with the increase of load, and fluctuates in a small range.