Static And Dynamic Analysis And Lightweight Design Of Typical Artillery Structure

Traditional artillery design mainly relies on experience of designers and design criterion, so there are many problems of lacking rationality in the artillery design, which results in cumbrous of the artillery and substandard of some performance indexes such as shooting accuracy. The method of structural optimization can provide a totally new and ideal design tool which can reduce the weight of a structure and improve its performance. Thus, it has been widely used in the field of artillery design. In this paper, the static and dynamic characteristics of the typical artillery are analyzed and the problem of the lightweight of the artillery is studied. The main work of this dissertation is as follows:1,The finite element analysis about the strength and stiffness performance index of the overall structure of artillery is carried out under the static load case. Through a detailed finite element analysis, it obtains the stress distribution and displacement distribution of the whole artillery. The results show that:the brackets are the most important component in the force transmission, and the recoil mainly pass by the plates of inner and outer of the brackets, and then transfer to the bed of artillery; Because the stress and displacement of the artillery is very low and the safety factor of the structure is relatively high, so it has large space to loss weight.2,The lightweight optimization of the brackets of the artillery was carried out. As the current structure of artillery is cumbrous, the mobility and flexibility is not good. In this paper, typical artillery was chosen as the research object. Considering the actual project, the topological optimization has been successfully applied in lightweight optimization of the bracket and a new topology of the bracket of the artillery was obtained. According to the result of this topological optimization, the reinforcements of the bracket of artillery were rearranged. And then, using size optimization, reinforcements'size of this new structure was re-optimized. In the premise of insuring the overall stiffness, the weight of this structure decreased successfully.3,The vibration characteristics of the whole artillery were analyzed, and the optimization of the front bracket is caried out. For low-shooting accuracy caused by severe vibration of the muzzle, simulation of the vibration property in shooting was carried out and the vibration curve of the muzzle was obtained. The influence of pivot position and stiffness of the front bracket on vibration of the muzzle was discussed, and the curve of maximum amplitude of the muzzle varying along with the pivot position and stiffness of the front bracket is obtained. Though parameter optimization, optimum pivot position and stiffness of the front bracket have been obtained, which meet the design requirements of lowering the vibration of the muzzle and improving the shooting accuracy.