Research on the Stiffness Characteristics of the Rotary Structure of the Cannon

Abstract

With the increasing requirements for the lightweight of the cannon, it is necessary to design the corresponding structure according to the specific load-bearing form of the cannon to ensure that the purpose of weight reduction can be achieved on the premise of meeting a certain rigidity. In this paper, for the cannon bracket, its structural form is simplified as a disk and double arms, and four characteristic variables of disk thickness, inclined length, straight arm thickness and curved arm thickness are obtained by extracting characteristic dimensions. According to the previous design experience, the feature size scheme design table is obtained. Models with different feature sizes were simulated and analyzed by the control variable method, and the effects of different feature sizes on the structural stiffness were explored. After analysis, it is found that the increase of the thickness of the disk, the decrease of the inclined length, and the increase of the wall thickness can improve the rigidity of the structure. And under the same thickness, the curved arm has better torsional stiffness than the straight arm, which can be increased by 15.2% on average. While the rigidity is improved, the requirements of light weight are realized. It provides a reference for the stiffness design of the double-arm structure that mainly bears the rotational torque.