Research On Lightweight Optimization Design Of Tracked Chariot Body

Tracked vehicles are widely used in various industries,especially in the military field.The development level of tracked vehicles indirectly reflects the national defense strength of each country.At the same time,as an important tactics technique index of military equipment,equipment lightweighting is an important way to improve the operational capability and tactical mobility of military equipment.In recent years,composite materials have been used more and more widely in the manufacture of weapons and armor due to their excellent material properties and advantages of weight.This article takes a kind of military tracked chariot as the research object,use the virtual prototyping technology to take multi-body dynamics analysis on several typical working conditions of the tracked chariot,and use the finite element method to carry out static analysis in various working situations,takes a discussion on the difference of overall static performance of the tracked chariot when changing the white car body's material and proceeding variable section design.Firstly,this paper expounds the application status of lightweight materials for tracked vehicles,introduced the recently research situation of the variable cross-section design detailedly.taking a theoretical research on the driving principle of crawler vehicles and the kinematics of crawler walking devices,introduced the basic theory of the body strength finite element method systematically,at the same time,we also introduced the finite element software which is used in the analysis of this article.Secondly,combining the tracked vehicle project,we build the Multi-body dynamics model of tracked vehicle traveling mechanism in RecurDyn software,and the simplified model of the body based on the UG is used to form a complete model of the tracked vehicle.In the RecurDyn environment,the virtual road surface is built,and the simulation work of three typical working conditions is completed including the high-drive tracked chasing condition,the over-ditch condition and the vertical obstacle working condition.According to the analysis,the tracked vehicle can meet the design requirements of off-road capability.Finally,according to the UG three-dimensional part digital model,after geometric surface correction such as curve correction and surface reconstruction,the shell element is mainly used,and the detailed finite element model of the tracked vehicle body is established in HyperMesh,the material properties and the boundary conditions of the tracked vehicle body is created basing the actual situation.According to the actual working conditions of the tracked vehicles,the Optistruct solver is used to analyze the static performance of the vehicle under different extreme conditions.The results show that the static characteristics of the vehicle body under various working conditions are feasible,but there is a problem of overperformance,therefore,the tracked vehicle should be further optimized.The composite material is used to replace the material of the tracked vehicle body,and the topology optimization of the original model is applicated to guide the variable cross-section design of the vehicle body,main to achieve the purpose of weight reduction of the whole vehicle.By comparing the performance of the non-optimization and optimized body,the optimized body still has a good static performance even under the overall quality reduction.It can be inferred that the optimization scheme is a feasible scheme.