Improvement Design And Optimization Of A Certain Type Of Tracked Armored Vehicle Body Based On Performance-driven

As a carrying machine with special functions,the tracked vehicle is a difficult and necessary subject to improve the design and optimization of its body structure.The tracked armored vehicle is one of its typical representatives in the military.This kind of vehicle needs to carry the occupant to move through the complex geographical environment.At the same time,the vehicle and the occupant must maintain a good state of preparation.The static and dynamic mechanical performance under the state puts forward higher requirements;and in order to ensure flexible movement capacity,the total weight of the vehicle must be reduced as much as possible.Therefore,the lightweight and performance improvement of the body structure is one of the development focuses of tracked armored vehicles.In this paper,the finite element analysis theory first establishes the calculation model of the body of the tracked armored vehicle,in which the boundary conditions select the loading and constraint conditions of the vehicle under seven typical motions and combat conditions to simulate the actual working state of the tank.The reliability of the mechanical properties of the original structure was verified by static analysis,but on the other hand,it also pointed out that ther e are defects in the design that the material utilization rate is too low.The frame design and composite armor material replacement completed on this basis have solved the contradiction between lightweight and structural performance design,improved the d efects of the original structure and improved its integrity.Based on the improved design of the car body,in order to solve the problem of local stress concentration and uneven distribution of the horizontal webs on both sides,the concept of variable cross-section design was introduced,and the web s were divided by the static analysis results to optimize the block size.The optimization results verify the advantages of the variable cross-section design in the local improvement of the plate structure.Finally,in order to improve the dynamic performance of the structure,the low-order modal performance of the car body is analyzed with the theoretical basis of modal analysis,and for the problem that two of the modals are close to environmental excitation,t he rib design of the head position is completed by topography optimization.After stiffening design,the local rigidity and various modes of the car body have been greatly improved.In this paper,the overall optimization design of the structure in terms o f light weight,mechanical and modal performance improvement has been completed with a "total score" design optimization idea and a "performance-driven" finite element design method.The research and development of the structure provides a reference for certain design ideas and optimization methods.